heres some info on my grow setup;
i have four feminized sweet tooth seedlings growing in New horizon organic and peat free soil. they are 2.5 weeks old. they are growing under a 600w hps lamp that is about 2 feet from the plants. i have been watering them with water laced with biobizz root juice, at about half the concentration recommended. the plants have 3-4 sets of leaves now(excluding the initial two leaves that sprout).
i noticed about 6 days ago that on the tips of the lower leaves they were turning yellow and curling downwards. the yellowing has continued to work inwards from the tips to the stem of the plant. it appears to be affecting only the older lower leaves, excluding heat burn as a cause i think. i have done some fairly extensive research on this site, however yellow leaves seem to symptomatic of many kinds of illness. what is unusual is that it is happening to seedlings. i get the impression they're fairly safe for the initial few weeks. this had led me to believe it might be due to over watering/poor drainage. i gather there is some kind of fungal/root rot that seedlings are particularly susceptible to. there were originally 5 plants but one of them died barely after it had appeared out of the ground. i have let the soil go very dry in the last two days, and have started misting the leaves and stem. will letting the soil dry help if theres a fungal infection? some of the leaves now are half yellow and certainly dead in the tips. i have been told that once they start turning it is best to remove them. is this the case? is it ok to start chopping off bits on such young plants?
the photos are about 4 days old. since they were taken the plants got worse, but appear to have improved in the last day or so. ive taken the photos in low lighting to help show the contrast between the healthy green parts and the yellow/brown that is starting to take over.
well thanks for reading all that. any help or guidance would be much appreciated. does my diagnosis seem correct?
Edited by peachymcsqueezy, 08 March 2009 - 06:07 PM.