Growing asparagus from seed - days to maturity

I planted asparagus seeds on a heat pad under lights, I did not soak the seed prior to planting.  I planted three varieties, Precoce d'Argenteuil, Connovers Colossal, and Mary Washington.  Oddly enough they all germinated on the same day.  I also planted a Purple Passion asparagus on a different day.

Days to maturity asparagus (Asparagus officinalis)
Seeds planted       10/08/2019       Day 0
Germinated           29/08/2019      Day 19
Flowered               22/02/2020      Just over six months
Harvest start          xx/xx/20xx      Day- I plan to update this later

Edit to add: There is a bit of genetic diversity among seed grown plants.  I probably could have harvested the larger ones in their first year of growth but decided it better to wait.  A small harvest was possible after 12 months for the largest Precoce d'Argenteuil plants, the smaller plants were ready a year later.  The other varieties were ready for harvest in their second or third years.  

Asparagus seedling germinating

Many people say it is difficult to grow asparagus from seed.  I have grown asparagus from seed several times and while asparagus isn't the easiest vegetable to grow from seed, it is far from the hardest.  Seedlings are easily lost to slugs or snails, and it does take a considerable amount of time from planting the seed until harvesting asparagus.  Buying year old crowns gets you past the danger of losing them to snails, plus it gets you 12 months closer to harvest.  

Two things seem to make growing asparagus from seed difficult, firstly getting seed from a decent variety.  Don't waste your time on F2 UC157 as it is poor quality and produces 1/3 the crop of the commercially grown F1 UC157.  Many sellers on ebay have fake seeds, they will send you seeds that are not the variety you paid for, or sometimes seeds that are not even asparagus and by the time you realise something is wrong it is too late to do anything about it.  Please don't buy asparagus seeds from ebay.

Secondly the large amount of time involved when growing asparagus from seed means there is a lot of opportunity for things to go wrong.  Most people buy asparagus crowns to dramatically increase their chance of getting a healthy asparagus plant.

It is said that it takes three years until you get a harvest, this is sometimes true and sometimes not.  It depends on the variety, the gender of the plant (they come in male or female), and how well you look after them.

Six month old asparagus seedlings, some are about one meter tall

Seed grown asparagus should not be harvested in its first year unless it is a particularly large and impressive plant.  Some plants can be lightly harvested in their second year if they are large enough.  The third year they produce a crop which seems to increase each year for quite a few years.  Some plants may not be large enough for a small harvest until their fourth year.  Some varieties, such as Precoce d'Argenteuil, are larger and move vigorous than many other varieties.  It is usually possible to harvest this one year before other varieties.

If you buy asparagus crowns in Australia they are often one year old, this will bring you a year closer to harvest than seed grown.  Asparagus seedlings are often decimated by snails and slugs, year old crowns still need to be protected but will often survive a snail attack.  For these reasons, it is best for most home gardeners to buy crowns rather than start seeds.  Notice that I said 'most' and not 'all', if you want to grow asparagus from seed go ahead.

Unfortunately it is very difficult to find asparagus crowns of many varieties in Australia.  A few places sell Mary Washington, one sells the dreadful F2 UC157 (which they have renamed to make them sound nicer), and occasionally some sell crowns of unnamed purple varieties.

I am currently growing a few named asparagus varieties.  In winter if I have any extra crowns I will hopefully be able to list several named varieties of asparagus through my for sale page.