Slow growing clones

I've had a bunch of clones growing in Coco, they were first vegged in rockwool at 6ph using florescent lights and one they had shown roots I put them in small 3x3x3 coco pots.

They have gone a yellowy light green and they're growth rate is no-where near what my other m8's clones (from same batch) have grown too. My leaves are small while my m8's are very large also.

The temps have been a little high (90f) I have put a good extractor in there and it's dropped to the 80's, I fed them 10% coco feed, a little bit of superthrive and they're sat under a 600w HPS light in a growtent.

I've given them a good flush, anything else I can do? Is the yellowing a lack of nitrogen or heat/ferts?

Anyone got any other ideas for me?

Thx

Coco is a hydroponic medium so you need to treat your plants like they are in a hydro set up. With the 3" pots you need to water them at least once per day. I usually start out with B-1 for 2 days then 1/4 nutes for 2-3 days then 1/2 nutes for 2-3 days then full nutes. When you up the nutes, watch for any burn and cut back if you see any.

Sometimes clones like to just sit there in the pot until they feel comfortable and then they will start growing really well.

Sometimes you come across clones that are photophobic and don't like a lot of light at first. Look at the parts of the leaves that have been shaded from the light by other leaves. Are they darker green? If so, you need to back the lights off a little.

PC :smokin: