MisterBlack
Active Member
Hello, I am new here. I have learned a lot lurking here, now I hope I can get some specific help.
I have a number of plants, various strains, some autos and some photoperiod. Many of them are sickly and week, with small leaves and maybe stunted growth.
Growing in a 4x4 tent with two LEDs and one conventional light (think it is HPS, not sure.) Plants are in soil that I try to amend with compost and then reuse. I add fertilizer about every 3 waterings at about half the suggested amount. Twice I added some molasses and microbes. I started this grow with just the LEDs, but the plants didn't look so good, so I added the HPS light hoping it would help. It hasn't helped. I tried just leaving them alone for a coupe weeks with plain water (I leave it out for a day or two), but they just looked sickly and weak.
They are getting worse every day. Leaves turning yellow with green veins, so gave them a shot of fertilizer for the nitrogen. Didn't help. Some of the leaves looked to me like magnesium deficiency, so I got some magnesium sulfide and added that. No help. A week ago I decided maybe they had nutrient lockout, even though I didn't feel I was overfeeding, so I flushed them to remove all the salts and anything else. Then I was away for a few days and when I came home they looked worse than before the flush - more turning really yellow with green veins, some with curled up, drying, dead leaves. That was about 6 days after the flush, with one watering (no nutes.)
Last night I didn't know what to do, so I thought maybe it was nute deficiency again and I mixed up some more fertilizer (regular strength this time) plus some microbes and a little magnesium again. Today they are worse.
I have used this tent and basic arrangement before without major problems. I have tried to isolate any variables that are different from before with not much luck. I don't over or under water. I have an oscillating fan and an exhaust fan. Temp is 25c and humidity about 50%. They are on 18/6 cycle.
What am I doing wrong???
I have a number of plants, various strains, some autos and some photoperiod. Many of them are sickly and week, with small leaves and maybe stunted growth.
Growing in a 4x4 tent with two LEDs and one conventional light (think it is HPS, not sure.) Plants are in soil that I try to amend with compost and then reuse. I add fertilizer about every 3 waterings at about half the suggested amount. Twice I added some molasses and microbes. I started this grow with just the LEDs, but the plants didn't look so good, so I added the HPS light hoping it would help. It hasn't helped. I tried just leaving them alone for a coupe weeks with plain water (I leave it out for a day or two), but they just looked sickly and weak.
They are getting worse every day. Leaves turning yellow with green veins, so gave them a shot of fertilizer for the nitrogen. Didn't help. Some of the leaves looked to me like magnesium deficiency, so I got some magnesium sulfide and added that. No help. A week ago I decided maybe they had nutrient lockout, even though I didn't feel I was overfeeding, so I flushed them to remove all the salts and anything else. Then I was away for a few days and when I came home they looked worse than before the flush - more turning really yellow with green veins, some with curled up, drying, dead leaves. That was about 6 days after the flush, with one watering (no nutes.)
Last night I didn't know what to do, so I thought maybe it was nute deficiency again and I mixed up some more fertilizer (regular strength this time) plus some microbes and a little magnesium again. Today they are worse.
I have used this tent and basic arrangement before without major problems. I have tried to isolate any variables that are different from before with not much luck. I don't over or under water. I have an oscillating fan and an exhaust fan. Temp is 25c and humidity about 50%. They are on 18/6 cycle.
What am I doing wrong???
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