On 07/06/2021 13:36, Jenny M Benson wrote:
I have 2 Jostaberries: one planted in the garden about 4 years ago and
one planted in a large tub about 3 years ago.Â* The one in the garden
looks very healthy - average height about 4' - 5', spread about 6', with
lots of young growth and leaves but very little fruit.Â* The one in the
sub looks very different - tall and rangy, not bushy, but carrying a lot
more fruit.

What should I do (and when) to encourage the garden one to produce more
fruit?

They seem to be quite tetchy about fruiting and need to feel a bit
threatened. I grow mine in a sunny position in not very good soil.

Soil too rich will be lots of vegetative growth. My problem is more that
birds will kill for them so if not netted they go before almost anything
else apart from the blueberries. A friend I gave a rooted cutting to got
nothing but green growth - I expect because their soil was too fertile.

--
Regards,
Martin Brown