what causes greenback on tomatoes?
Answers:
It's usually because they've ripened too quickly. Feeding them every other day helps, but it's just something that happens with greenhouse tomatoes.
You can stop it by keeping an old banana in the greenhouse. (It gives off ethylene which makes the tomatoes ripen uniformly). However, they'd then taste just like ones from Tescos.
Other answers:
This is usually caused by either too much sun or a lack of potash.
This is usually caused by either too much sun or a lack of potash.