Slow Stunted New growth

Serisous Problems here!!!!

Been vegging 40 white rhino for about 6 weeks, realized i had overwatered them at 4 weeks, as they were very droopy. Stopped watering until the pots were totaly dry.

Now: The new growth is very slow if at all (6 weeks vegging and only 7-9 inches!!!) and very slightly yellowing. But the older leafs are growing very large and wide.

Anyone got any ideas wot the prob is? How can i get the new growth kick started again?

well it sounds like your plant may have a nitrogen deficiency due to the yellowing leaves,if your plants are growing new leaves then it could be using the nitrogen in the older leaves to do that coz nitrogen is very good for leaf growth,thats why plants need more nitrogen when vegging,,,,have you been ph'ing?and are the temps in ya grow space right?

The ph is coming out of the tap at 7.5. i haven't been changing it. I read a high ph is alright in pots? The temps have been varying. depending on the wheather, I have CO2 in there as well. But it has been going as low as 60 degrees and as high as 90. the lights are on 24 hours

Come on bros any other ideas, i stumped on this one

I've got the same problem, i'm at like 7 weeks and have had all the problems, growing good now but i still have problems with heat and humidity.

easylife said:

The temps have been varying. depending on the wheather ... it has been going as low as 60 degrees and as high as 90. the lights are on 24 hours

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Ouch! A temp as low as 60 causes the plant to use less nutes and water making it easy to over-feed ... a temp of 90, if left too long or repeated too often will damage your plants irreparably ... You've got to find a more even temp somehow. Try not to go lower than 68 at night and 85 (MAX) in the daytime. If you can keep the temps between 72 - 78 that would be best. 6 - 8 inches isn't overly horrible at 6 weeks if you've grown from seed and your lighting is not optimum ... if you have good lighting however, that's another story.

Try watering them with a 10% nute solution (10% max) for the next couple of weeks. DO NOT water until the soil dries out completely - I mean, completely - then water until it comes out the drain holes. Repeat this process until harvest. DO NOT put more than 10% nutes in the water but don't put 0% either. Nutrient lock may be an issue here. (If plants receive nutes for a while then plain water (no nutes) they can 'lock-up' to try and preserve the nutes already in their 'system.')

I think that's your best route for now. Try it and see what happens. Be patient. Let them do their thing on a good watering schedule (soak, dry, soak, dry ...) with minimal nutes. Good luck.