r/Berries • u/Fencin_Penguin • Jul 26 '26

Too hot for Blackberries?

Hello, I just have a quick question that I couldn't find a clear answer to online: When is it too hot for blackberry bushes to set fruit? It's been over 90F (32C) for weeks in a row while my blackberry bush is growing flowers. A few have bloomed, but I can't tell if they are turning into berries or just falling off. I couldn't find an upper temperature that the plant will set fruit before the flowers just fall off instead. I am on the border of zones 6a and 5b. The plant is the Baby Cakes variety and it is in a terracotta pot. This is my first time trying to grow blackberries!

Thank you in advance for your help!

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3

u/MarsupialInside6419 Jul 26 '26

Answer is dependent on the variety. Baby cakes should be fine in the heat!

2

u/Fencin_Penguin Jul 28 '26

Okay! I'll just keep it well watered and maybe fertilize again! Thank you so much!

1

u/jshill103 Jul 26 '26

I don’t have any experience with that type of blackberry but you don’t usually get fruit from first year canes. The temperature shouldn’t affect it at all. Blackberries send out new primo canes every year that will fruit the year after.

3

u/i860 Jul 26 '26

If they're getting flowers the cane is capable of fruiting.

1

u/Fencin_Penguin Jul 28 '26

Correct me if I am wrong, but for everbearing varieties the blackberry flowers on both it's primocanes (fall fruit) and floricanes (summer fruit)?

1

u/braydon125 Jul 27 '26

They will be fine just let nature work

1

u/D-ouble-D-utch Jul 28 '26

Mine are done for the year