Irish Daily Mail - - Gardening -

Q Can you of­fer ad­vice on my to­ma­toes which have ‘green back’? I was told it was a lack of potash but adding it doesn’t solve the prob­lem. It af­fects my ‘Ali­cante’ and ‘Shirley’ va­ri­eties. A ‘Green back’ man­i­fests as hard green ar­eas on the shoul­der of the fruits. The causes are in­suf­fi­cient or ir­reg­u­lar wa­ter­ing, light lev­els and/or feed­ing so en­sure a steady sup­ply of all three. Q I have black spot on my roses – even on the ‘Peace’ and ‘Wendy Cousins’ va­ri­eties. Could you rec­om­mend a good spray? A Weather con­di­tions have been ideal for the black spot fun­gus this year. I can’t rec­om­mend a spray but pick­ing off and burn­ing the leaves, in­clud­ing any that have fallen, is a good idea. Roses re­cover well so don’t worry too much. Q I have a ten-year-old self-fer­tile green­gage tree on dwarf root stock. De­spite fol­low­ing prun­ing ad­vice, I get no fruit just flow­ers. Help! A Green­gages and plums flower early and are vul­ner­a­ble to frosts and lack of pol­li­na­tors. You can’t avoid frosts, but en­cour­ag­ing bees into your gar­den will help. Make sure the tree is wa­tered, kept weeded and mulched. And be pa­tient! Ten is still very young for a green­gage tree.

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