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Q – I remove all the male flowers from my courgette plants. Is this right?

Matt – There’s no harm in leaving them in there and you don’t need to remove them.

Bob – You do need to do this with cucumbers though to stop them becoming bitter

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Q – We have a thriving onion club in Paxton but we are suffering from White Rot.Ìý What can we do to stop this?

Bob – There is no cure.Ìý You need to start with clean seed, clean potting compost and grow in tubs.Ìý

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Q – After seeds have germinated and been potted on when is the optimum time for feeding?

Anne – I don’t normally feed my seedlings, the act of potting them on is enough. However, if you’re not moving them on and they get pot-bound then I would feed.

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Q – Why has my rhubarb gone to seed in early April?

Anne – I think it’s down to the variety.Ìý I have a ‘Timperley Early’ that did well at my parents but has never flowered at mine.Ìý It could be something in the climate.

Bob – It might be that the plants didn’t do well last year so want to do better this year.Ìý Chop them down as low as you can and then give them a good feed.

Matt – The combination of dry and cold could have stressed the plants

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Q – Does mist-spraying fruit trees when they’re in blossom protect from frost?

Bob – My vines, Kiwi and Mulberry have all been hit badly with frost this year.Ìý If it’s a light frost then spraying can help. Do it before the sun comes up if you can.Ìý Vapours around the tree can help too.

Matt – A thin layer of fleece can really help

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Q – I have over 350 square yards (293 square metres) of cobbles that are riddled with weeds.Ìý What natural methods can you recommend?

Matt – You could try dry mortar mix to fill in the gaps

Anne – My husband sprays with glyphosate.Ìý You could put a flock of chickens on it.

Bob – I use large pieces of old carpet over the winter and that keeps it weed free in spring.Ìý Then I pour boiling water over it in small increments over the year.

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Q – Our four-year-old Forsythia is large and healthy but it refuses to flower.Ìý What can I do?

Matt – I would prune in April.Ìý It flowers on one-year-old wood.Ìý Make sure it is well watered and fed with sulphate of potash.Ìý

Anne – I wouldn’t prune until it starts flowering and then prune about a third of it and prune it hard!

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Q – Pelargonium and Geranium cuttings: when is the best time to hormone rooting compound?

Anne – People don’t use it any more

Bob – Don’t pot your Pelargonium and Geranium cuttings the day you take them.Ìý Let the cut end dry and close over then it roots better.

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Q – In the wild most plants thrive without human attention, so why do we make such a fuss?

Anne – Because we’re trying to grow plants not necessarily in their perfect environment

Bob – I’d dispute this – next time you’re out in the wild look much closer! There are pests and diseases everywhere!