Hi mate, I thought id have a look at whats going on after you posted in my coco thread.
Ok, I will help you get through this grow and if you do exactly as I say you will have success for sure. But I will give it the simple as poss route. Coco although hydro isn't the demon people think, infact its incredibly simple to use providing you feed everyday with nutrients and have your ph adjusted. A digital ph pen is a must for growing in coco, its a one of payment and a great investment.
Im not sure what feeds you have access to so im going to give you rules to follow and if you follow them you will have great plants. the beauty of growing in coco is shitty plants can become amazing in a very short amount of time, however the opposite is true also if you don't follow the rules.
Also I strongly recommend buying and EC/PPM meter as this will make mixing nutes far easier as bottles instructions can not be relied in from experience.
I am an expert coco grower and have grown many thousands of plants in this medium so theres not much I haven't seen, ive probs grown 20-30k plants this way, shit thats a lot! just thinking about it is giving me a head ache lol.
There is scope to adjust up or down in the directions im about to give but if you just follow it you will def get a result, its up to you to then fine tune it next time.
I can't understand the logic of 10% perlite in the coco, there is absolutely no need for this and it makes it a worse medium in my opinion. you can not over water coco so I don't understand the adding of perlite.
Ok. So first thing you want to do is start feeding nutes every day, twice a day is better because you have the perlite in the mix, without the perlite once would have been fine. However the plants will definitely respond better to multiple feedings in this media.
DO NOT allow the coco to dry out!! Its one of the biggest errors people new to coco do, especially when transitioning from soil. It will burn the roots and cause plants to lock up.
I would feed my base nutrient at 1.5ec/750ppm and add a rot stimulator. set ph at 5.8. its impossible for me to guess what ml per litre based on the nutes you are using as ive never used them. If you are going off the bottle give them 3/4 strength for a week and see how the plants respond, if they are greening up and taking off its good, if its still slow growth try full strength. Also its a good idea to add calmag to coco grows if you can get it, add that before your base nutrient and all you need is 0.1-0.2ec/50-100ppms.
When you transition to flower set your base nutrient to 1.6-1.8ec/800-900ppm and then add any pk or boosts you may use. make sure the total ec value does not exceed 2.2ec/1100ppm. and set ph at 6.0.
Its that simple. f you follow that and feed everyday you will get good strong plants. There are things to do that make better plants but stick with the absolute basics for now.
Ignore advice given by someone stood behind the counter of a grow shop, their Botton line is profit and the amount of bad information ive heard in grow shops is shocking. Too many people have opinions and give advice when it comes to growing without even having tried or tested the method. The best advice I can give you when searching for good sources of info is to just ask what they have grown and how? If someone says 'I grow in soil BUT', then they aren't the person to ask about a coco grow. Just make sure the people giving you advice know what they are talking about.
Anyway hope this helps.
Goodluck.
Bagseed in a 17.5cm square pot. The bricks stop it from blowing over. The plant is about waist height & flowering nicely. It went from a 1l milk carton to the pot. It won't yield close to my other plants, but it will yield quite a bit.
maybe next grow
and a big thanks to the folk who have guided you, cause from day 1 till now you've done well and the girls are responding in a happy way...