Mendo Purps yellowing and slow growth

These are my Mendo Purps cuttings at about 3 weeks.

Running them in cocoa/gold and purlite.

Flood and drain to reservoir system with 4 1000watt HPS
General Hydroponics nutes, (Lucas Formula) PPM of 750 ph of 6.5 temp at 65-70 F
In veg mode now...

May be watering too much. this cocoa doesn't seem to drain very fast, first time using it.

Have them at 2 minutes (how long it takes to drain from bottom) when lights come on
2 minutes 6 hours later and another 2 minutes 6 hours after that.

They are showing new growth but really slow going. Yellowing a bit and have that curling over look and broad leafed like some of the over watering pics.

Any ideas guys?

Any ideas?

those ppms are a tad high...and you want your pH to hover around 5.5-6.0, and try flooding once a day..

Flooding once a day? With fresh water or from the res?

So you don't think it is an over watering situation but more due to Ph and nutes?

it looks a lil overwatered..since you are doing soil i would nute it once every 2 weeks. the rest make sure it is RO water pH'd to 5.5-6.0. flush them with RO water, and let the soil dry out before you water them again.

More of a drip to res hydro setup with cocoa/purlite mix. Using GH nutes and adding CalMag now. I will slow the watering down until the root balls are of sufficient size to suck up more of the moisture and dry out the pots faster. As of now it takes 3 full days to lighten up.

Any ideas of a cheap RO filter?

An RO set up can be as cheap as $120, but most likely in the neighborhood of $150+ for anything worth the money.

Using GH nutes and adding CalMag now....

Click to expand...

Nute burn. I wouldn't add the cal mag, probably not a solution to your problem. Just flush and watch what happens.

I think it was a little of both, overwatering and nutes too strong.

THe little 3" cuttings have blown up to fat 14" bushes and going strong.

I lowered the ppm's to 800 and only 1 watering per day for 2 minutes.

Now that the root balls are expanding they are sucking up more of the moisture. I'll have to add another watering soon.