Advice needed!!! leaves just started to droop (pics) +rep for answers

Week 2 in coco (600ppm) - did week 1 at 300ppm using only advanced GMB and roots excel and now they have started to droop pH is at 6 and they have had nil nat added to the water

Any ideas?...

Thx in advance

How often and how much per time do you water?

They are 20L pots and i gave 10L at the start of week 1 and 10L at the start of week 2

Thx

Where these pics taken at lights out ?

Huh?.. no - they are under hps in veg 18/6 in canna coco

The thing about drooping leaves is that it can happen if you water too much as well as too little. You have drainage hole in your pots? Maybe water twice a week from now on if you assume underwater. If you assume overwater then water less per time. You know your plants more than anyone else. Is your plant most likely underwatered or overwatered?

Yeah i have good drainage - if i had to guess i'd say a little overwatered - just don't want it to be nute burn or anything irreversible!

Any advice - do they need a flush or should i just let them dry out and hope for the best?...

There is no cal/mag added - I DO have Advanced sensi cal grow but it says on the back of the bottle that it is NOT needed in veg if you are using Advanced nutrients base products.

anyone?.............

You don't need to add nutes every time you water. Infact you shouldn't. That's another reason to water twice a week, once with nutes and once without. Dont flush since its already most likely overwatered. Just don't add as much water each time. For the next few weeks use nutes at half strength, you may have effects of over nuteing due to adding nutes at every watering.

I thought with coco - as a rule you were to add nutes every watering and flush once a month.

Ok I did some investigating and yes continue to nute with every water. Also in my investigstion I figured the problem... The way you water. 20L pots are to be feed 5L twice a week. Increase frequency as plant gets older. Increase your feed frequency and decrease feed amount per. Do that and your plant will stop drooping.

Thx man - i just hope itsn't overfertilising as it does seem a bit burnt at the sides of the leaves - will leave it for this week and see if it picks up any

One of them is looking better than the other.

Seedlings need to be watered more than once a week. I don't care how big the pot is. Seedlings are like kids.
Their metabolism is fast and they grow fast. I would have her in smaller pots and water 6 ounces or so twice a day.

Look straight down at the plant. Notice that the sl's leaves are a long way from reaching the side of the pot. Roots grow
out the same as the big leaves. Until the leaves are as wide as the pot your plant is mostly just building the root system.
That;s why we transplant 2 or 3 times as the plant grows. It is healthy for plants to get a bit rootbound. Helps make the
plant bushier. So, watch them and you will see little or no action until the leaves reach the pot sides. Until then buy a deck
of cards and play solitary. 'Cuz you sure as hell ain't doing much else for a while in those jumbo pots.

BigSteve.