C99 Closet Grow

[filthyjoobag]

Hey guys, it's my first grow and I have a query.
I have just noticed on my plants some brown marks and the leaves are yellowing. I think it might be calcium/magnesium/nitrogen def. but some experienced advice would be welcome. They are on day 14 from seed.

Growing under 125w cfl 6500k and 2 23w 2700k so far.
Lights are 24/0 atm Temps between 24C-30C RH is 35-45%
Seeds are C99 fem. in Coco/perlite 80/20 mix
Water is from tap and britta filtered, I haven't got an ec meter, only ph.

Nutes are dutch pro a+b grow, dutch pro multi total and superthrive. I have been watering with ph 5.9-6.1. With ph 5.3-5.5 runoff. I have fed twice with nutes at a 1/4 strength. My schedule has been watering twice plain ph'd and then the nutes feed. Its working out at a feed every other day atm. Haven't given any superthrive yet.


Any help would be great and if i've missed any info let me know. Cheers guys!!

 

[filthyjoobag]

I thought i uploaded pics but here is not the link.

 

[Spimp]

You did. But this site does not allow off site image hosting.

Here's a link to upload the pics so we can all see them.
HOW TO UPLOAD PICS

p.s. to

 

[filthyjoobag]

My bad, I should have read the rules!!! Thanks Spimp!

 

[Spimp]

Youre welcome.
The first leaf pic I would bet is from pinching it across the planter.
As for the second Im not sure. Maybe a more experienced grower will chime in to help ya.

 

[Touchmejesus]

My leaves were getting yellow when I was using Coco I was due to switch to soil 2 weeks after I noticed in the mean time I watered with Calmag from shogun 2ml per litre and normal grow nutes and they picked up fast. Yours look a lot like mine. Also I took them from a hps and put them under a PLL Cfl so that might be helpful but I would guess it's the nutes. After I transplanted to soil they shot up. Coco takes a lot of work and I repeatedly fucked up. here are some early pics when they were yellow and after.
In coco

Still in coco and perlite

Now in soil

 

[labexperiment]

In your first post you said you are watering every other day. This will probably end up hurting your girls. Proper watering should be only when the medium is mostly dry(80-90% dry), then water slowly till you get run off out the bottom of your pots, then do not water again until they are mostly dry.

Hope this helps, good luck.

 

[labexperiment]

The second pic looks like something on the leaf that could be wiped off. Have you tried to wipe it off with your fingers(carefully of course). Other then that I am not sure what it is.

 

[filthyjoobag]

Thanks guys I am going to try source some CalMag but I'm finding it difficult in my neck of the woods. I don't think I'm going to give up on Coco just yet....

I have been using the 'lift' technique for judging when to water them and I'm watering until I get around 20% run-off everytime. If i leave them longer than two days they don't seem to get any lighter... So I don't think I'm overwatering, they are 4" high pots and dry out a lot even by the end of the watering day.. I was under the imression that Coco was very hard to overwater....

 

[Touchmejesus]

The best way to learn is to fail. Just keep adapting and your plants will too.

 

[slowgro]

Thanks guys I am going to try source some CalMag but I'm finding it difficult in my neck of the woods. I don't think I'm going to give up on Coco just yet....

I have been using the 'lift' technique for judging when to water them and I'm watering until I get around 20% run-off everytime. If i leave them longer than two days they don't seem to get any lighter... So I don't think I'm overwatering, they are 4" high pots and dry out a lot even by the end of the watering day.. I was under the imression that Coco was very hard to overwater....

They look overwatered to me too - leaves not flattening can be from that. Hold off watering until you can actually see the leaves beginning to droop or wilt. That's what gives them the message to grow more roots and reach deeper.

Speaking of which - getting them into bigger pots would be good. Early veg is about developing a robust root system, so they don't 'run out of gas' when they need it.