Purple Stem / Leaf Curling Away

Hey there!

First time grower just here for some help! I've done a ton of research but I'd like a second opinion! I am growing from seed.

Seedling: Rockwool A-OK Starter Plug, once I seen the first taproot show out of the bottom I transplanted them into what meant to be 50% Canna Coco Coir and 50% Perlite but its probably 30% Coco and 70% Perlite at this point!

From what I've read I'm supposed to feed nutes from "Day 1" since its a "Nute Free Medium Grow".

I fed this for roughly the first 2 weeks. But started noticing deficiencies!

3L Tap Water (Don't have RO just yet will come soon)
1ML Advanced Nutrients Sensi Coco Grow A & B
PH to 5.5

(1/3rd of what the Bottle suggested)

I kept seeing purple-ing of new leaves and the stem is also purple which to my understanding is a Phosphorus deficiency. The first 2 weeks they have been slumpy, especially the first set of leaves, dark dark green almost a blue hue to them!

So I made this new batch of nutes:

3L Tap Water
1ML Advanced Nutrients Sensi Coco Grow A & B
0.5ml Big Bud Coco
PH to 5.5

For the past 3 days they have perk'd up quite nicely from when I wake up till around 3 hrs before lights turn off.



Using a Mars II 1600 LED and a 4x4 tent. Temps have been stable at 23-25 Celsius and RH at 40-44% throughout the grow. They were germinated 17th January 2019

did u pre charge the coco with calmag and is it part of your food?

Did not pre charge the coco and it is not yet part of my food. I thought I didn't need it yet! I will add some to my feed and let you know how it goes!

My only water available: Hardwater at like 250ppm :/

Thanks for the advice!

whats the ppm?1ml/3L sounds low.

Just gave em

3L water
1ml Calmag
1 ml advanced sensi coco grow a & b
1ml voodoo juice
0.5ml big bud as pk booster
ph to 5.5

came out at 460ppm

Up your pH to 5.8...you're a little low at 5.5 Also, ditch the pk booster...use that when you're flowering, but not right now. As noted above, uncharged, unwashed coco will do a number on your girls...but if you're careful and patient, they will generally grow through it at the cost of time and some yield. For the future heavily rinse and then 'buffer' your coco before you use it next time. Also keep in mind coco likes Ca and Mg, so be sure you're adding enough (but not too much) for both the coco and the plant, otherwise deficiencies will loom. Good luck friend.

Raise your leds a bit more, and ph6.0 and there is no need to rinse canna coco. Flush them with a weak nutrient until your run off is same ph and ec as your putting in and all should be well in a week or so.

Appreciate all the feedback!

IRaised the LED's by a couple of inches. I'll give an update in a week or two!

Draws said:

Appreciate all the feedback!

IRaised the LED's by a couple of inches. I'll give an update in a week or two!

Click to expand...

When I grew under purple leds I kept the lights about 3ft above the plant tops, and slowly moved them down when I seen too much stretch. If not you get stunted growth, small roots to much lights for the plants to handle.Your plants also look to be too wet, perlite should not go green with algae.

The green algae was from the rockwool cube that I started the seedling in. There are also multiple roots sticking out of the bottom of the pot already!