Seedlings are sorta yellow... should I freak?

[aquanaut]

Seedlings are sorta yellow... should I freak? Plants are at Day 8 vegging.

Things that changed in the last 3 days:


Lowered 150w MH 12"~ above seedlings.
Started to dose 50% strength nutes recomended for Canna A & B nutes at Week 1



http://i49.tinypic.com/14awiuo.jpg

http://i49.tinypic.com/w9h18o.jpg

[palerider7777]

day 8 from seed? if so thats a bit much on nutes.it takes around 2 to 4 days just to sprout. i looked at pics they look fine to me tho.but keep an eye on em.

[bigtopsfinn]

They look fine from the pics but they don't need nutrients yet, wait until there's about 5 nodes.

Keep in mind also that the instructions on the bottle are not always correct. Always start with half the recommended dose and slowly work up. If the tips of the leaves start getting yellow and burnt, it means you over-fertilized them, aka nute-burn.

Happy growing :jointsmile:

[sarah louise]

They look fine from the pics but they don't need nutrients yet, wait until there's about 5 nodes.

If they were in fertilised soil I would possibly agree but they aren't, they look to be in coco. Coco is an inert, hydroponic medium, if he was to leave the feeding until 5 nodes they would be dead before they got even close.

Aquanaut, if you are using Canna's coco balance nutrient formula I'd got with about 1ml/L A+B, increasing to 1.5ml/L if they haven't greened back up in the next few days.

[bigtopsfinn]

they look to be in coco

My apologies in that case :error:... never seen that kind of coco, looked like soil maybe mixed with some coco.

Aquanat - just for future reference, give more details! As you can see, it's easy to misdiagnose or give bad advice if we don't have all the info :thumbsup:

[aquanaut]

Heh, sorry for that fact. Yes, I'm growing in 100% coco.

I've started to dose 1ml/gallon using Canna's A + B (2 part nute mix) but starting to think that isn't enough if you are saying 1ml/L

Here are today's photo's and they look even more yellow! Think I should up the dosage?


Day 9 since seeds popped out of the coco.

http://i49.tinypic.com/opd4ir.jpg

http://i45.tinypic.com/34sfqty.jpg

[sarah louise]

1 ml/g lol, ... mate I rehydrate coco pucks for clones in a stronger solution than that. It's hardly 50% of the dose suggested for early veg... actually it's about 15%. So yes, they probably could use a bit more nutrition. With seedlings I usually go with-

first watering 0.5ml/l
second " 0.75ml/L
third " 1.0ml/L
forth " 1.25ml/L
fifth " 1.5m/L

Canna suggest (for medium feeding, with medium water hardness) 1.8 ml/L for early vegetative growth and 2.5 ml/L for fast vegetative growth, I tend to remain under 1.8 ml/L for most of vegetative growth and only get to 2.5 ml/L during transition to flower.

There is a calculator for Canna products here. (http://growguide.info/) Just chose your product line, fill in your details and press the button.

[aquanaut]

1 ml/g lol, ... mate I rehydrate coco pucks for clones in a stronger solution than that. It's hardly 50% of the dose suggested for early veg... actually it's about 15%. So yes, they probably could use a bit more nutrition. With seedlings I usually go with-

first watering 0.5ml/l
second " 0.75ml/L
third " 1.0ml/L
forth " 1.25ml/L
fifth " 1.5m/L

Canna suggest (for medium feeding, with medium water hardness) 1.8 ml/L for early vegetative growth and 2.5 ml/L for fast vegetative growth, I tend to remain under 1.8 ml/L for most of vegetative growth and only get to 2.5 ml/L during transition to flower.

There is a calculator for Canna products here. (http://growguide.info/) Just chose your product line, fill in your details and press the button.

Holy moly... now why did I not use that... according to you and that calculator... I'm under feedings =[

Hope I can fix this with tomorrow mornings watering.

Thanks again sarah louise!

[sarah louise]

Increase nutrient strength gradually and they'll be fine.