Courgettes leaves yellow and green

Hi
I sowed courgettes in pots they sprouted first adult leaf on each plant was yellow, I planted them out and have feed them with both liquid seaweed and a balanced fertilizer past few weeks but still new leaves look the same, what am I doing wrong, soil is improved clay is moist but doesn't saturate with water in same soil I have onions and potatos that are a picture of health, its same with all 6 courgette plants , will they just grow out of this our am I wasting my time on them ?

 

Too cold still. I think the yellow in the leaves is because the low temperatures slow the production of chlorophyll. There's no point adding extra nitrogen or magnesium now as these will not be utilised until we have some warmth, at which point the leaves should turn green, at least the new ones will.

 

I think that's a large cotyledon, and possibly what's keeping the plant alive.

 

Mine were similar and I put it down to a chilly May. The other issue I had was my compost when they were in pots was holding too much water (some of the new peat free composts have been like that in my experience).

I planted mine out last weekend and male flowers have started already, but not that many new leaves so I’m keeping my eye on them. If you look in the middle of yours - there is new growth and the existing yellow leaves will just shrivel away.

 

I'm thinking virus.

 

I also thought that was a courgette at first look, but it’s a seed leaf. Strange that’s so green though?? They usually shrivel away first.

 

There are several reasons why courgettes grow yellow leaves, but not always easy to know why, especially when it's because of over or under watering or over or under feeding. Courgettes like compost and manure but they don't need masses of fertiliser which can cause an imbalance of trace elements.

How has your weather been? Do you live in the north or the south? It has been very wet and cool this year. Courgettes like sunshine, they don't like shade or cold.

Another possibility could be aphids under the leaves but I don't think it's that.

 

Glad it's not just me. My courgettes and tromboncino squashes all look like this too, and my cucumbers look so sad (got one or two adult leaves then stopped growing) I'm thinking of sowing new ones. Weather forecast shows us getting above 20C in the near future here in the south, so hopefully everything will cheer up then.

 

It's just too cold for them, put some kind of plastic cover or fleece over it until the weather improves (if ever).

 

I've not planted out my melons yet due to the weather, but they are growing ok in a cold greenhouse, I always think melons to be more tender than other cucurbits, other than perhaps greenhouse cucumbers.

 

I think its another case of starting them too early for the conditions you have been able to give them. Again , as you have not given your location, it is difficult to advise on how best to proceed for next time.
Here on the Solent coast I sow some (say 3) early , to plant out around April 30th under cover. Sow 'main batch' for late May planting out, re-homing surplus for ££. Then sow a few as insurance, just in case.
Black beauty var. from Lidl gets you at least 8 seeds for 49 pence, with a quantity rate available, really its not worth the worry !
If you have more seed, then sow some more now. Once these have got 4 true leaves, plant them out. At that time decide the fate of these. They may yet develop but I have serious doubts.

 

I reckon it's due to the weather. It's been a lot cooler this year so things like courgettes are suffering. My pumpkins and courgettes are the same.