Light green skinny growth on top

I have 5 plants that were under a scrog for last 4 weeks. Anywhere from 16-20 tops per plants. Under 2k watts. In coco running botanicare + silica and sometimes superthrive/cal-mag

I've been trying to figure out why the new growth is so skinny and light green. They seem to be growing slow. Last feeding was 1300 ppm (a lot higher then what I have been feeding. 800 before) they responded no different with higher nutes. No nute burn either

My friends garden has leaves dark green the size of my hand about and bigger. I feel like the growth is twisted and slowed by something

Temps are 77-79 in the room. 81 at the plants height. Ventilated 10x10 room with 550 cfm fan. Two air cooled lights. I do have them farther away right now then normal. Prolly 35in.

Any ideas or suggestions are welcome. I do not supplement co2 because I feel the ventilation is sufficient.

Sent from my DROID RAZR using Rollitup mobile app

Here is a picture

Flush with nutrients at 600ppm and a correct ph. It looks like you may have a bit of lockout starting.

Could be excess salt build up or ph issues. Flushing with low ppm water will solve both problems.


Run 3x your container size to flush with.

Things should bounce bwck in 2-5 days

They are in 10 gallon smart pots. I'll flush tomorrow. I pH right to 5.8. Ill have to check it out to make sure its reading right but its always 5.75-5.85. $200 pH tester. I use botanicare CNS in coco mixed with a little perlite

Sent from my DROID RAZR using Rollitup mobile app

When you say 1300ppm are you talking about an EC of 1.9 or 2.6? Big diff...

Unfortunately my meter doesn't read EC. I've wanted to buy a new one after doing some in depth reading

Sent from my DROID RAZR using Rollitup mobile app

It matters. If they are in veg and your meter is reading 1300 on a .5 conversion that is an EC of 2.6 which could be super hot. (.5 ppm 1300x2=2600. Drop the zero's. 26, add a . = 2.6 ec. If you have one of those cheap tdsXXX brown meters they use a .7 conversion. Should always use EC if you can. or if you know how your meter reads you can always convert it using a conversion chart. peace bro...
ps; Like everyone said I would try and flush them too