elliot1001 at aol.co.uk
Mon Nov 6 16:55:32 EST 2000
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.
More information about the Plantbio