Thornlessness in brambleberries appears to be influenced by at least three different factors. Scientists and plant breeders have understood these factors reasonably well for quite some time. Each of them has different advantages and disadvantages. But how do you keep a thornless berry thornless, and how do you prevent a brambleberry from reverting to being thorny?
First, let me tell you about my experience growing a "thornless youngberry", then let me explain the three different ways that brambleberries can be thornless, then I will explain what you do about each of the three types.
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| Thornless youngberry starting to ripen |
