basil with yellow leaves

I'm growing basil in my cellar under grow lights (see signature link for setup).

The basil, which is grown from seed, started very green when I repotted them, but the new sets of leaves are yellow.

Can anyone shed any light on what the problem may be please?

Thanks
Gin

 

I grow Basil in pots on the windowsill and never have any problems. Maybe it needs proper sunlight?

 

Two 4ft tubes aren`t really enough, basil is a tropical herb so it likes plenty of light.
As you are in the cellar, the temperature may be another issue ideally somewhere around 18-20c at night and 25c when the lights are on.

 

Take it out of the cellar and get it onto a sunny windowsill.

 

The tubes provide ample light. The basil I am having probs with are only seedlings. Everything else seems to do ok.

However, I have placed the 3 pots of basil in to heated propagator trays (still under the lights and I think they're greening up a little at the tips of the leaves.

I will bring one of them out to the greenhouse to see if it picks up over the weekend. I suspect a combination of too much water and not enough heat - although the temp in the cellar is between 15-20 degrees due to central heating pipes - but I find that over watered soil seems to keep the soil cooler for longer as it takes longer to dry and out being self cooling in a fashion.

I'll report back after the migration. :D