Coco is different from soil and it should not be treated like soil, coco is a hydroponic medium (soilless medium), some like to call it 'semi-hydroponic' because it is more forgiving than full hydro. The thing is, you can water coco like you water soil, every day or 2 and you will get soil results but if you water coco a few times per day you will really reap the rewards of hydroponic results in a more stable medium. When dialing the watering schedule it's important to take into consideration the size of pot that your using and the size of your root mass, for example if you pot up some freshly rooted clones into 6.5Ltr pots and start watering them 3x per day you will run into some problems. People like to say that you can't overwater in coco, I agree with them to a certain extent but you can overwater if you give them too much when they don't have a well developed root system, that's why it's important to harden off the roots and let 'em go hunting for nutrients at the beginning, this will help to build the root system. When I pot up a freshly rooted cut I let it have wet-dry cycles for a few days then I slowly up my watering, at the end of week one I'm watering once per day, I aim to be watering 3x per day by the end of week 2. Once the root system is developed it is very very hard to overwater, they will take all you can throw at 'em and ask for more.
I also think it's important to mention that coco doesn't require the same size of a pot compared to soil, I have grown plants at 9.25oz in a 6.5Ltr pot. Less is more, unless your looking trees, don't go over 6.5Ltrs, there really is no need plus if you have a pot that's too big you could run into overwatering problems and possibly root rot. I like to add hydroton at the base of my pots, this assists in drainage, I also add layer of hydroton at the top of the coco to help slow down evaporation. I'd highly advise you to do them 2 things. Stopping evaporation is very important, the process of evaporation removes water from the coco and leaves behind salts which will cause both PH and toxicity problems, macro and micro nutrients will get locked out with the excess salts in the coco. You want to keep coco WET so all excess salts are constantly being soaked and flushed out of the medium.
Once you water 3x per day your plants will start to grow super fast, FAT stalks, branching growing like crazy, it really is fun seeing the explosive growth rate. I feed 3 x per day right up until flower stretch is over then I bang up the waterings to 5x per day, just as the buds switch into swelling mode, the plants react great. You see, when you feed a plant you aren't just giving it fresh nutrients, you are also giving fresh oxygen to the roots, the nutrient solution saturates the medium and pushes out the stale O2, as the solution works its way down the medium it draws in fresh oxygen from the top, this is one of the reasons why I think multi feeding works so well with coco. Your giving your plants access to more fresh oxygen.
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