Sue Sanderson

Sue Sanderson – our horticulturist expert


Sue Says
The usual cause of greenback is excessive heat in the greenhouse during the development of the fruit. The risk of this can be reduced by applying shading to the glass in early summer, damping down the greenhouse paths in the morning on hot summer days, and ensuring that there is adequate ventilation. All of these measures will help to reduce plant stress on hot days. Whilst it may be too late this season, I would strongly recommend using all 3 of these measures next year.
Greenback can also be caused by a lack of potassium. Feed the plants regularly with a high potash feed regularly to prevent this disorder. Try http://www.thompson-morgan.com/sundries1/product/kww2552/1.html
There are also some varieties that have greenback resistance such as Alicante and Cristal that might be worth a try next year.

Return to Q & A home page

×

Why You Need a Unique Forum Account

Feel free to browse and search the forum for topics that interest you without creating an account. To participate and contribute you will need to register and create an account.

This will enable you to create your own posts, comment on other posts, upload any photos you wish to share and so much more.

Why You Cannot Use Your Thompson & Morgan Account

The main Thompson & Morgan website is completely separate from this Forum. As such, the Forum requires a completely separate account.

×