Tomato dropping blossoms - overfertilized?
I have a gardeners delight tomato plant (undetermined cherry) growing in a big pot indoors. I planted it about 3 months ago, it is now good 1.5m high and started growing thruses of blossoms. The blossosm are however are having issues. On one hand, only a few blossoms reach full size, the rest of the bunch seems to be stuck in a premature stage. Whats even worse, the mature blossoms started falling off, despite my efforts to hand polinate them.
I have a grow light helping my plants in these dark winter days and a warm air blower to keep temperature and humidity in check.
Reading up on it and excluding other factors (temperature and humidity) my theory is that my blossom problem is due to overfertilization. I applied a generous amount (i thought it was still within limits) of miracle gro granulated slow release fertilizer (N intensive one) to the mix before potting. Occasionally I also fed the plant with a few sips of miracle gro pour and feed (balanced one), the plant seemed to be enjoying it...
But now I think I need to get rid of some excess N. Any suggestions on how to do it? The problem obviosuly is that I have a full grown plant, I cant go about replacing the soil or anything can I?