Yellowing courgettes

We moved last autumn.  The veg patch was covered with black plastic but on peeling it back we found that the previous owners had had a bonfire on part of the patch.  Anyway dug the lot over at the start of the season and all is well at the moment apart from my courgettes.  I planted four plants, two are fine but two have yellow leaves.  I don't know if it has anything to do with the bonfire (they are planted roughly in that area), or whether they need a good feed.  Any ideas anyone?  What should I feed them with?  They have been in about 3-4 weeks and are growing.  Haven't a clue if anything was grown on the land last year and if so what.

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  • ItalophileItalophile Posts: 1,647

    That two are fine and two have yellow leaves suggests there's nothing particularly wrong with the soil. Try giving them a feed with a tomato fertiliser. It will provide enough nitrogen to lift the foliage without giving them too much which would lead to foliage growth in lieu of fruit.

  • TeenrbeeTeenrbee Posts: 57

    Great, thanks for that I will give them a feed today.

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