These tiny plants are desperately in need of nitrogen. A lack of nitrogen will slow down their growth and will cause the leaves to turn pale (yellow). I would advise you to add horn shavings, fresh grass cuttings, stinging nettle manure and compost.
The addition of potassium is always of benefit in the case of mosquito infestation. Wood ash and rock flour can often work wonders as well.
You will need to check the condition of the soil at the moment. Only then should be adding any of these be considered: The main nutrients are nitrogen, phosphorus, potassium, magnesium, and calcium — plants require these in relatively high quantities. Trace nutrients such as iron, manganese, molybdenum, zinc, silicon, and boron are needed in small amounts by plants, but are still important.
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Yes I give them Foxfarm grow big / Foxfarm big bloom which should have what they need.
I do not have a mosquito issue.