Dahlia from seed - the first year

My daughter grew a dahlia (and a bunch of other flowers) from seed last year.  She was proud of herself, I was proud of her too.  We left it in the soil where it was overwinter and it started to grow again this Spring.

Dahlias used to be a South American root vegetable with pretty flowers.  Somewhere along the way people stopped growing them for food and focused on flowers.  I have no idea how this one tastes, next winter when this plant is dormant, if my daughter is not looking, I may sneak a little taste.

I can hardly wait for it to flower again this year, such a lovely little plant.

Are Spider Plants Edible - Chlorophytum comosum

Spider plants (Chlorophytum comosum) have a bunch of fun names including hen and chickens, airplane plant, ribbon plant, spider ivy, St Bernard's lily. In Puerto Rico they call this plant "malamadre” which roughly translates to “bad mother”, I love that name.

Spider plants are interesting, they send out flower stalks that sometimes have flowers but more often just have baby plants instead. These baby plants can be potted up and grow into more plants. The flowers are small and uninteresting and can set seed, but it is these baby plants that are the main reason people grow spider plants.

When I was a child our house had a spider plant in a hanging basket. It didn’t get any direct sunlight, it never got fertilised or repotted, it rarely got watered, and when it was watered it was over watered and left sitting in a saucer of stagnant water. That plant grew for many years and flowered and sent out flower stalks with baby plantlets at the tips. As far as I know it is still alive.

Not many plants are so well adapted to the harsh extremes of being a house plant.

My little variegated spider plant starting to develop roots

There are several varieties of spider plant, some of the better known ones are: variegated, which has green leaves with a white stripe down its center. Reverse variegated forms have a green center and white edges on each leaf. Full green forms have leaves that are entirely green and presumably grow faster than variegated forms. There is even a curly leaf variety which is variegated and has curly leaves.

Recently I got a tiny variegated spider plant baby. I put it in my pocket in the morning and forgot about it while I was at work for the day. When I got home I found this bruised thing in my pocket and remembered what it was, I didn’t have time to do anything so I put it in some water and forgot about it again.

A week later the leaves had picked up and it had started to grow roots, so I planted it in a pot of soil. It was winter so it didn’t do very much, then when spring hit it started to grow pretty fast.

Again, I can’t think of many plants that will survive that kind of abuse.

Spider plants apparently don’t like too much water or they will rot. I am told to let them dry out between waterings. From my experience they seem to grow ok if I just keeping them watered all the time.

I just grow mine in a pot of soil, I assume potting mix is far better. I protect mine from frost as I think frosts would kill it. Spider plants grow thick fleshy roots, at times they also develop larger storage roots that help them survive through times of little water.

I have heard that spider plant is edible, but there are a few plants with the common name of spider plant so I did some research in peer reviewed papers using its binomial name, Chlorophytum comosum, and found a few interesting results.

Spider plant potted up and ready to grow

Most of the papers I found were comparing the yield or chemical composition of different varieties, some were to do with animal fodder, but others were for human consumption.

Apparently the leaves of spider plant are edible, but few people eat them. What I found interesting is that in a few countries such as Iran and India the roots of spider plants were eaten by people. I am assuming that they were eaten cooked in stews or similar, but the papers were unclear.

Perhaps, much like many ornamental plants, the spider plant was once a vegetable? They are certainly simple to grow. I decided to eat one to see what I thought.

My little spider plant growing larger

I ate some leaves raw, they didn't really taste of anything much. It didn't taste unpleasant, it didn't taste of anything at all that I could notice.

They were crisp and took some chewing, perhaps younger leaves would be softer. The leaves were not fibrous, but they were firmer than most things I eat. As they don't really have a taste they could be put in a salad and whatever else is in there would be the star of the dish, but I think the texture would take some getting used to as it is unlike anything else that I eat. Then again, if it cut finely and mixed with other tastier leaves it may add interest to a salad's texture. When my plant is larger I will give it another try.

When it is time to repot I may try to eat a few of the plump storage roots. I will probably eat one raw, and I should try to cook one. If I remember I will try to write a blog post on how that goes.

Who knows, perhaps this is yet another easy to grow perennial vegetable, or perhaps they taste horrible, I will find out soon enough.

If you have a plant and decide to eat one please do some research first, and only try a little to see if it disagrees with you. If you begin to vomit uncontrollably I take no responsibility, that is on you.

Spider plant, growing larger every day!

Spider plant sending up a flower stalk

I hope that my little plant flowers soon so I can try to grow them from seed as I think that would be interesting. Apparently short days and long nights induce flowering, so perhaps I could make it flower. If I can track down some of the more unusual varieties I would love to try crossing them and seeing what interesting new varieties I can create.

At some stage I will likely have extra spider plants, but it won't be for a while yet. When this happens I will try to list them on my for sale page.

Persian speedwell - my lawn is buzzing

My lawn is buzzing, but only in the morning.  Then it is silent.

Persian speedwell (Veronica persica) is one of the many flowering weeds that grows in my lawn.  It grows by itself and has lovely blue flowers in Spring.  Honey bees, hover flies, and other insects love the flowers.

Each morning the bees collect pollen and nectar from the flowers.

Persian speedwell has pretty blue flowers

There are so many bees on the Persian speedwell early each morning that my lawn hums.  You can hear the lawn from quite some distance because it is absolutely filled with foraging bees.  While honey bees dominate, there are also some hover flies and a few other little insects collecting nectar and pollen.

Once they have emptied all the flowers they leave and my lawn is silent again.  The following morning new flowers will open and the humming will begin again.

Honey bees and hover flies seem to like the flowers

The Persian speedwell started out as a few small plants in among the lawn a few years ago.  I allowed it to spread, and now it covers a considerable amount of the front lawn and is starting to pop up around the back.

It is usually only there for part of Spring, then it sets seed and dies. 

I took these photos a little while ago, most of my lawn is now brown and dead.  There are still a few patches of Persian speedwell about in sheltered positions.  It will die off soon, then the seeds will be ready in the soil for next spring.

Persian speedwell feeding bees and spreading slowly

I am not sure if Persian speedwell is edible or useful in any way.  I don't really care.  I don't water it, I don't plant it, I don't collect its seed, I don't tend it, it just grows when it is time and feeds bees and other beneficial insects. 

Persian speedwell and other weeds in my spring lawn

Persian speedwell is only low growing, so when I mow the lawn I often only take a little off the top and it is able to flower not too long afterwards.

The main down side to Persian speedwell is that it is only ephemeral and not there for much of the year.

I am glad that there are little flowering weeds like this around, and I am glad that I now live in an area where things like this are able to survive.  I wish I had more little flowering lawn weeds like this.

How I Grow Saffron - it is easy

Saffron (Crocus sativus) has a beautiful flower and a lovely spice that is surprisingly easy to grow.

Saffron is expensive, both the spice as well as the corms are expensive. Saffron is really well suited to growing in the backyard and is really low maintenance. Saffron grows such a pretty flower, the flower smells nice, bees seem to like them, and the spice is lovely and so easy to collect on a small scale.

I am surprised at how few home gardeners grow saffron. More people should grow saffron at home.

I used to be told by home growers that saffron is simple to grow but difficult to get to flower. The high price and the reputation for difficulty getting a crop made me put off growing saffron for years. I eventually paid a lot of money for a handful of tiny corms and discovered that growing saffron was really easy.

I was given good advice by knowledgeable people and did lots of research when I started growing saffron. I find saffron easy to grow and it flowers well for me.

Saffron threads ready for harvesting

Saffron flowers are pretty, smell nice, and produce saffron threads

Saffron only flowers once per year, and each flower only produces 3 threads, so you want your corms to flower each year and you want multiple flowers per corm.

Although I say that each flower produces 3 threads you will notice that some smaller flowers will only produce 2 threads. From what I have seen they only do this when the plant is exhausted after they have already produced a number of flowers. It is like the plant is giving one last push to get out as many flowers as possible but it lacks the energy to make a full sized flower with 3 threads. This is nothing to worry about. An extra 2 threads is better than nothing.

Some of the biggest mistakes people make are not removing competition, and not allowing them to have enough sunlight or decent soil. Competition, either from being planted too close or from other plants nearby will deprive the plants of energy and they won’t flower.

Saffron also needs full sun to flower. If something is shading them they are in the wrong spot and may not flower for you. I grow some in pots and some in the soil, they all flower equally well. Once they have finished flowering you need to leave the plant alone, if you cut the leaves they will not capture enough sunlight to feed the corm and you won’t have flowers next year.

Saffron corms only flower when they are large enough and have enough stored energy, small corms will not flower no matter how well you look after them. Many growers measure the circumference of their corms and consider 7cm to be the minimum circumference they will reliably flower.

My 7cm corms always put out a few flowers, but I get more flowers out of my larger corms. Smaller corms can flower in future years, so look after them well and they should grow fatter and divide and you should have multiple plants flowering next year.

Some saffron grows the flower before the leaves, others grow leaves before the flowers

Saffron is as pretty as ornamental flowers - why isn't it grown more often?

I am told by people with a lot more experience in saffron than I have that in order to initiate flowering saffron needs a hot summer, a cold winter, and for the corms to be planted surprisingly deep.

The cold winter thing makes sense, a lot of flowering bulbs need cold winters in order to flower. The winter here is cold and my saffron always flowers well. I am told that unlike things like tulips that you should not put saffron corms in the fridge. Apparently they need heat while they are dormant. I am not sure if this is true as I have not experimented with it, I store them in the garage where it is hot, or I leave some in the soil over summer where it is also hot/dry, and they flower well for me.

The planting depth is really surprising to me. Normally you only plant corms and bulbs to a depth of two or three times their width, saffron corms need to go a lot deeper! Even though the corms are really small they are meant to flower best when planted 15 to 20 cm deep. I don’t know if this is true or not and I haven’t messed around with this, I plant mine at least 20 cm deep and they reliably flower well.

It seems odd to say that I have not experimented with any of this, but the people who gave me the advice really knew their stuff and through following their advice my saffron has flowered reliably. Most people I know with saffron don't have great success, while I have great success, so I keep doing what I was told would work. If it works then there is no reason for me to mess around with it.

As saffron completes its growing season it tends to divide into new corms. I am told that saffron corms can increase anywhere from 0 to about 15 new corms every year. Higher numbers sound great as it means you would have plenty of new plants, but if they divide into too many then most/all would be too small to flower. It is probably best for them to split into fewer corms and for most of them to flower the following year.

I am told that planting at 10cm results in many tiny corms and no flowers. I haven't played around with this, I plant deep and get a lot of flowers. Perhaps I should plant a couple really shallow next year to build up numbers.

Saffron - I removed the weeds before they grew too big

For some reason, maybe the depth I plant, maybe the cold winters, maybe something else entirely, mine tend to divide into 2 large corms and they both usually flower the following year. I am happy with this as I end up with two corms that are flowering size from each one that I originally planted.

Sometimes I get more and sometimes I get a few smaller ones, but for me they mostly divide into 2 flowering sized corms. This means I essentially double my saffron investment each year.

I don’t have huge amounts of space to grow things, or to be more accurate I grow huge amounts of things. For this reason I sometimes alternate growing saffron and vegetables in the same garden bed, when saffron is dormant I grow vegetables, when they die down I plant saffron.

Saffron is dormant over summer, and it likes to be dry when dormant. If you have wet summers then dig the corms up and put them somewhere safe. I just use a mesh bag in the garage away from direct sunlight. If the soil is pretty dry over summer you can leave them where they are. I dig some and I leave some, it depends if I need that space to grow something else. If you grow them in a pot of soil it is easy to keep them dry over the dormant season.

I am not sure if saffron suffers any pests or diseases, I haven’t had anything bother mine yet. While pests don’t appear to like them, beneficial insects such as honey bees appear to like saffron.

I am told that bees collect nectar as well as pollen from saffron, and I often see honey bees work the flowers early in the morning. I don’t grow much saffron so I am sure it makes very little difference to the bees, but if everyone in my street grew saffron it would make a difference to the local bees.

I grow saffron in several places in the garden, this year I also grew some saffron in a large pot. These corms grew foliage first, then flowered. Just like all the others, each corm produced multiple flowers.

The pot was filled with cheap potting mix in the top and guinea pig manure/straw underneath, these corms grew large, the largest was about 18cm circumference. I wonder how many flowers I will get from a corm this large!

Saffron starting to grow

Saffron flowers - I had already harvested the threads from the open flowers

Saffron plants gathering energy prior to going dormant - I planted 3 and you can see they have already divided

Saffron does not grow from seeds. If someone is selling saffron seeds they are a thief, keep well away from them and don't buy anything they have for sale.

Saffron is a sterile triploid that does not produce seed. Saffron does produce pollen and can (with difficulty) pollinate some of the wild ancestors, but that is a story for another time.

Saffron grows from corms, to get corms you must divide existing corms. Some varieties are evidently more potent or better than others. I am not sure how these varieties arose or what variety I have.

I am told that saffron corms with a circumference of 7cm or larger should flower. In my limited experience this appears to be true. Saffron corms are not perfectly round, they are odd shaped and have rounded parts and flat parts and various bumps, I guess this is why I am told to use circumference rather than diameter. To measure the circumference I wrap a piece of string around the corm and then measure the string.Very simple.

I sell saffron corms in Australia when they are dormant through my for sale page. I don't sell any that are less than 7cm circumference so they should flower for you. I don’t have large numbers and they reproduce slowly for me, so I never offer many for sale. If you are overseas and are sure your country will allow them in then I could also post to you. I can’t guarantee the corms that I sell will flower, but I only sell corms that are large enough to flower and in my garden would produce multiple flowers.

True potato onion seeds Australia

We have so few varieties of potato onion (Allium cepa var. aggregatum) in Australia, they used to be grown in every home garden and now they are increasingly rare. For a few years practically nowhere sold them, I am happy to say that this seems to have passed and a few places now stock potato onions to sell to home gardeners. They only appear to have one or two varieties, but it is a great start!

Potato onions are perennial vegetables that are great for permaculture gardeners and kitchen gardens. They are simple to grow, they reproduce by them selves, they return decent crops, but they are too small for my liking.

Potato onions usually don’t flower and the flowers usually won’t set seed, so there are no serious breeding efforts aimed at increasing their size. To remedy this I needed to make my plants flower and produce seed.

A few years ago my potato onions flowered and set viable seed, not many seeds but a few. It took a bit of work but I got a few seedlings from them. All of these displayed a high amount of genetic diversity and every seedling was unique and distinct from all the others.

Oddly enough my seed grown plants showed an increased propensity to flower and a good number of their seeds were viable. Breeding potato onions then became not only possible but also pretty easy.

Seed grown potato onions from the same batch display a lot of genetic diversity

Then a grower friend of mine generously gave me some potato onion seed that were descended from the rather impressive "Green Mountain" potato onions. I grew these and got some nice seedlings from them.

I allowed all my plants to open pollinate, planted a lot of genetically diverse seed, and culled hard. As I now had flowering potato onions from diverse genetics I was able to select for larger onions of different colours. I quickly made a lot of progress, I selected based on size and colour. What I didn’t do was think this through.

After a while I had large onions that did not multiply and had little storage ability, much like many onion varieties that already exist but with less storage ability. I moved house and lost the majority of these ‘potato onions’.

In hind sight I am glad that I lost them, they grew fast and were very large and looked really impressive, but they were a step backwards.

Some seed grown potato onions - highly variable

I still had some of the parent stock that can set seed, and I still had some of the Green Mountain seed that was getting old and losing viability. So I started again, but this time I am putting more thought into it.

This time I have less space and less time so progress is painfully slow, but I am taking a more strategic approach so should get a better outcome.

I still want larger onions, current potato onions are too small to be worthwhile growing and the larger size is the entire point of growing potato onions from true seed. I also want a few more colours, the current potato onions are lacking in this regard. This time I am also selecting for their ability to divide, and for their storage ability. It is these last two criteria that differentiate a regular onion from a potato onion, losing these traits just makes another variety of regular onion.

The ability to divide is one of the most important traits. The whole point of potato onions is that they are perennial and divide so you never have to bother with saving seed.

All these seeds were planted the same day, some are big and some are tiny

Allium seeds tend to have a short life and viability of seed tends to drop off rapidly after a year. Each year I produce more true potato onion seed than I can sow, and rather than waste this I thought I would offer it for sale in Australia to people who are interested. Who knows, perhaps someone will grow something amazing from this.

I plan to sell mixed true potato onion seed from the original stock as well as from the lines I am trying to develop. Some may contain genetics from the improved Green Mountain onions while some will not. This seed is produced from potato onions that divide in my garden and have reasonable storage.

Some of the parent potato onions

Various potato onions

White potato onions multiplying

This has been open pollinated, so I have no way to know what unique genetic combinations will exist. I only grow perennial onions and it may have crossed with any or none of these. This is open pollinated seed and each seedling will be genetically unique. Any plant that is perennial is a new variety and you will be able to share it around and name it as you wish.

Every seedling will be unique, some will produce large bulbs, others will produce small bulbs, and some may not bulb at all. Some will divide like mad, and others will not. Some may grow top sets but most will not. Most should be perennial but there is a small chance that some may be biennial. There should be a nice range of colours.

Potato onion flowers - should produce a lot of seed this year

Honey bees like potato onion flowers

Being open pollinated means there are no guarantees of anything other than diversity. I only collect seed from plants that have reasonable sized bulbs and divide well. Having a decent plant as the female parent increases the chances of growing something good.

As onion seed generally has a short viability I only sell seed that is less than one year old. My potato onions are flowering right now. If you are interested in true potato onion seed it will be listed on my for sale page when it is available.

Controlling cabbage white butterflies naturally - Pteromalus puparum in Australia

My daughter, much like many kids her age, loves butterflies.  Butterfly kits where they send you a chrysalis to hatch are very expensive.  Native butterflies have a hard enough time as it is so I would prefer my daughter just watch them in the garden and we didn't collect their chrysalis.

My vegetable garden, much like many organic vegetable gardens, has cabbage white butterflies.  There are canola fields less than one kilometer from my house, spilled canola seed on roadsides acts as a breeding ground for these pests, and they flutter over my fence all summer long.  I often collect pupa or caterpillars from plants and feed them to the chickens. 

I have heaps of caterpillars, and my daughter wants butterflies.  Can you guess where this is going…

I collected some cabbage white pupa and put them in a jar for my daughter.  She got to watch a few butterflies emerge.  We also caught a few adult cabbage white butterflies and put them in a little enclosure to watch them flutter around.  It was heaps of fun.

Later in the season when I collect cabbage white caterpillars off my plants I plan to give them to my daughter to grow into butterflies.  She should enjoy that.  Cabbage white butterflies are an introduced pests, so catching these is not a problem.

Everything went well and my daughter was proud of her butterfly farm.  Then something strange happened to one of the pupa.  It turned the wrong shade of brown, a small round hole appeared in its side, and a bunch of tiny pteromalid wasps emerged.  My daughter was horrified and thought they were ants.  The truth was far more horrifying when I explained it to her, they were little parasitoid wasps and had eaten the pupa from the inside. 

Pteromalus puparum photo from - https://www.inaturalist.org/taxa/264352-Pteromalus-puparum

These parasitoid wasps presumably mated and laid eggs in the other pupa that were in the jar.  Eventually I had a jar full of tiny parasitoid wasps and dead hollowed out butterfly pupa.  We gladly released these wasps into my vegetable garden.

These wasps appear to be Pteromalus puparum.  They are a pupal endoparasite of several butterflies, they search out pupa and inject venom and eggs into the host.  The number of eggs they lay in a host varies depending on the size of the host.  Once the eggs hatch they eat out the host from the inside, then they pupate and emerge as adults who mate and look for more hosts in which to lay eggs.  They have been used overseas to help control numbers of cabbage white butterflies.

I am unsure when these wasps were introduced into Australia, but I am assuming it was not terribly long ago.  These tiny wasps were once sighted in VIC, WA, and northern QLD.  Many references state it was introduced in Australia but its establishment is uncertain.

Following some incredibly bad advice from Jerry Coleby Williams and Gardening Australia I planted land cress (Barbarea vulgaris) to help control cabbage white butterflies.  It didn't work.  These parasitoid wasps, however, have been proven to reduce the numbers of these butterflies and have been introduced here and several countries in an attempt to combat these pests.

This is incredibly exciting, if these parasitoid wasps can establish a background population in my area they may help to control cabbage white butterflies.  Don’t be fooled, they won’t ever eliminate these pests for me, but they should help to lower their numbers.  Lower numbers of pests means less damage to crops.

I grow everything organically.  If I spray insecticides, even organic insecticides, then these tiny wasps will be the first to die.