Hi, I hope you will be able to help me.
I am growing 5 moneymaker tomato plants under artificial light. They are
potted in a mix of perlite and potting compost; roughly 3:1 maybe 1.5.
They are lit by 5 minifluoro tubes, the kind with their own on board
ballast, designed for replacing indoor bayonet bulbs. There are 4x11w (600
lumen each) bulbs and a 15w (900 lumen). They are on a 24/7 light cycle,
i.e. no night. This is a lot of light in a 15"square growbox. The position
of the plants in relation to the lights can be varied to take account of
growth up to 5'.
The reason for that is I would like a crop of toms for Xmas :-)
Now they have chlorotic leaves which I guess is caused by a lack of
magnesium and/or iron. I am also guessing that because of the constant
light the plants cannot draw sufficient other nutrients from the soil mix at
a speed sufficient to support the nitrogen fed growth.
So what are the thoughts on feeding fertilizer and on varying the light
All sensible, well intentioned advice welcome.