Starting in coco, if expandable, unbuffered bricks, mix a gallon of your nutrient solution, and use it to expand the coco. Make sure it’s ph’ed between 5.8-6.0. Squeeze it out by hand until it isn’t juicy. When your seed is ready, put it in the coco.
At sprout, spritz a clear solo cup with distilled water and put it over the little baby. The plant is sucking it’s moisture from the top to feed the bottom to establish the root system. Just spritz the cup and leave it for a week to two weeks. Or until the leaves touch the sides.
At this point, start feeding, not watering but feeding, about 5ml a couple inches from the main stem and a few drops at the main stem. I like to take a dropper and put a few drops at the drain hole so the roots reach. Again, pH to the preferred coco range. You may not have to feed her every day, you may have to.
Then, it just depends on how fast she is soaking it up. You’ll want to feed until runoff every day, sometimes every other.
I can’t preach enough about ph’ing your feed between 5.8 and 6.0. Unbuffered coco is treated as hydro. Basically a soft surface for your roots to collect nutrients and be able to move.
Most growers have great success using coco and Jack’s Nutrient 321 system. It is the same feed from seed to harvest and is very gentle, but produces quality bud. It is also easy to adjust should the plants have different nutrient preferences.
Now, if your coco is loaded already, read up on it, and see what pH it is prebuffered to. That is what you will want to stick with. In most cases, mediums with preloaded amendments, don’t need feeding for a couple/few weeks. Check your runoff levels, should this be the case, and when your ppm’s are under 1,000, feed.
An easy way to see if your coco is brebuffered is to do a slurry text. Get a cup full of coco, a flood it with distilled water. Shake it around, let it settle, and collect some of the water from the top, then test the ppm’s.
IF I AM WRONG ON ANYTHING CORRECT ME, PLEASE. I stopped coco, because it requires too much attention and I just don’t have the time at the moment. It is a great medium and plant development is much quicker and more vigorous.
I hope this helps. Good luck and happy growing!!!
thankful for this community and all the knowledge that is shared here 
just added my ventalation pump to push air out and i ordered the 6 inch fans that were recommended on this forum in route 
