Most of my outdoor tomatoes, variety Urbikany, are developing greenback, or more accurately orangeback. Tried to water them regularly, no feed other than compost mulch. I thought this was a greenhouse problem due to excessive heat build up. Is it the general heat in this exceptional year, or any suggestions for what I need to do differently next year?
Hi Derek, I reckon it’s the variety, not your methods or the weather.
In my tunnel for example I have a Black Cherry and every fruit has greenback, while the neighbouring plants of other varieties do not.
I have also found that Gardeners’ Delight is prone to greenback. The fruit are good to eat, lacking a little beauty!