Plants yellowing after moving to coco/perlite

[ChenBenTz]

Ever since I transplanted my plants in coco/perlite after removing the soil around the roots and replanting them, they've been consistently yellow.

Is it because I'm not watering enough? I water every 3-4 days just like with soil and they never wilt.

The nutrients are the same. I did switch to reverse osmosis though.

Maybe the roots haven't gotten used to the new medium, or maybe I planted them wrong and they've strangled each other?

They're also not growing very fast.

Compared to the hydro plants, which receive the exact same nutrients, and look green and healthy..

 

[_tessarecting]

Whats your ph? Are they getting enough Ca / Mg?

 

[Phychotron]

Coco has no nutrients in it, you must provide everything the plant needs. It looks like it just needs a good feed. Ca/Mg might be low on RO water as well. Especially with the perlite fluffing it up, you'll need to feed a lot.

Canna brand nutrients are very against perlite in the medium. It doesn't have the same magical properties like Coco does. Specifically a Ca/Mg interaction.

Did you use a brick of coco and mix it yourself? or did you start with a bag of 'premium' pre-treated/rinsed coco formulated for plants? The bricks need to be washed and treated with ca/mg.

 

[ChenBenTz]

Whats your ph? Are they getting enough Ca / Mg?

pH is generally around 6-6.4.

I'm using the full line of Dutch Pro Soft Water nutrients:

Hydro/Coco Grow (A+B) (1.5ml per L)
Take Root (1ml per L)
Multi-Total (1ml per L)
Keep it Clean (0.1ml per L)

It also seems like the plants further away from the light are less yellow and more green. What could possibly cause this?

I'm actually wondering if I should just get rid of the coco/perlite and put them all in hydro containers, since the hydro plants are doing so well.

 

[Mikell]

I'd lower the pH to 5.8 and figure out how to post nutrient measurements in EC

Showing mild K deficiency and nutrient burn.

 

[ChenBenTz]

I'd lower the pH to 5.8 and figure out how to post nutrient measurements in EC

Showing mild K deficiency and nutrient burn.

The odd thing about the EC is that the manufacturer says that the EC should be 1.7 (if I remember correctly), but using their charts, my EC was around 0.7 after adding nutes.

 

[MickFoster]

The first thing you need to understand is that coco is hydro - not soil - and should not be treated like soil. The pH should be around 5.8, you should feed every day with at least 10% run-off, and if you are using r/o water you should supplement with cal-mag.

 

[EastCoast710]

pH is generally around 6-6.4.

I'm using the full line of Dutch Pro Soft Water nutrients:

Hydro/Coco Grow (A+B) (1.5ml per L)
Take Root (1ml per L)
Multi-Total (1ml per L)
Keep it Clean (0.1ml per L)

It also seems like the plants further away from the light are less yellow and more green. What could possibly cause this?

I'm actually wondering if I should just get rid of the coco/perlite and put them all in hydro containers, since the hydro plants are doing so well.

5.8-6.2 is what I use. with fantastic results in coco.. also.. looks underfed.

 

[CriticalCheeze]

The odd thing about the EC is that the manufacturer says that the EC should be 1.7 (if I remember correctly), but using their charts, my EC was around 0.7 after adding nutes.

Originally Posted by Mikell View Post
I'd lower the pH to 5.8 and figure out how to post nutrient measurements in EC

Showing mild K deficiency and nutrient burn.


Your kind of contradicting yourself... your telling him he has nutrient deficiency but nutrient burn at the same time?... man.... flush the plant, check the ph run off, coco should be 5.2-6.0. the plant has slight ph issues and possibly ca/mg def. Possibly some nitrogen starting, considering those 2 go hand in hand sometimes. yes this post is late, but i get pissed when people start saying random things without the research to back any of it up. then new growers listen to this advice and then potentially end up with more of a problem then when they started.

 

[CriticalCheeze]

Originally Posted by Mikell View Post
I'd lower the pH to 5.8 and figure out how to post nutrient measurements in EC

Showing mild K deficiency and nutrient burn.


Your kind of contradicting yourself... your telling him he has nutrient deficiency but nutrient burn at the same time?... man.... flush the plant, check the ph run off, coco should be 5.5-6.0. the plant has slight ph issues and possibly ca/mg def. Possibly some nitrogen starting, considering those 2 go hand in hand sometimes. yes this post is late, but i get pissed when people start saying random things without the research to back any of it up. then new growers listen to this advice and then potentially end up with more of a problem then when they started.

.

 

[Mikell]

Overfeeding out of pH range will produce those results, in my experience. A visual deficiency does not exclusively indicate a lack of nutrition.

If your experience is different, post it.

You would be well served to drop the assumptions and attitude. There are many here who will not respond as diplomatically. I am wondering why I am myself.

Cheers

 

[Ganoderma]

You say that they where in soil and you transplanted them into a coco. Did you remove all of the soil or just some of it? If you only removed some of it, most of the roots are still going to be in the soil of the root ball.

Yes I know people talk about PH range for coco. In this case until the roots start to grow out and into the new medium which has a different PH range for nutrient up take, you need your water to be PH'ed for what the root ball is made of. Ph you nutrients for soil for something like a week, maybe a little longer for those that look worst.

 

[sourpuss]

Have to agree with Mike. .. although I'd say not enough Cal mag... switching to ro and transplanting into coco was a big change.. I'd suspect Cal mG needed is all...

 

[ChenBenTz]

Jesus, guys. It's been 5 months. Doesn't anyone look at the dates anymore?

Answers:

It wasn't a pH issue or a Cal/Mag issue. The nutrients I was using were crap.

Switched to H&G Cocos and within 2 days I had a jungle.

However, in flower, plants didn't do quite as well. Ostensibly this was caused by a lack of PK as well as insufficient waterings (coco plants take a LOT of water).