I am new to using Coco Coir , and very cool medium . After I keep digging for articles on the internet about growing with Coco Coir , Things got easier . The article I found said Coco Coir holds more water and air than rockwool , which explains why I was underwatering my Coco Coir medium . Basically , Coco works great for me because I like to overwater things . They say to water Coco Coir until you get a 10% runoff of the total water amount added . The article said if I remember , that your watering is really like a flush everytime you water . Also , it said the way you measure PH of the Medium is not correct , and that the proper way is to measure the PH of the 10% runoff . I read somewhere that when you use new Coco Coir you might have to adjust the PH maybe , I guess with something that is PH up or PH down ; I forget which , My plants just stopped growing and then I read the article and now I water deeper and more often with runoff the goal of each watering . I think the article said that the top of the Coco Coir should feel wet after watering , and that you can wait until the top of the Coco Coir is only damp when it is time to water again ,
I am starting to love this Coco Coir because I was looking for a medium that performed like rockwool . Also Coco Coir works good whether you mix perlite with it or not . I use a dry general prefertilized Coco Coir as my fertilizer and mix that with regular Coco Coir and then I experiment with no perlite up to 40 percent perlite . Doesn't seem to matter either way how much or no perlite .
Also I bought a 2 pound bag of Urea 46 - 0 - 0 Nitrogen fertilizer because I am under low light flourescant and it's winter time with weak sunlight . I add some garlic powder to the surface of the medium . The garlic keeps insects away , and garlic powder seems to really help seeds grow when they first are visisble popping out of the medium . Also , the garlic has sulfates in it and the addition of garlic powder will increase the terpines generated by your plant , and you can smell the great smell of whatever plant you are growing . Also the garlic powder , which I guess has some sulfur in it , is an anti fungal and anti bacterial . I also use Calcium mixed with Amino Acids to make cell walls thicker and produces pectin between cells .
All that effect is to make your plant resistant to powdery mildew and other fungus and mold and bacteria which extends the life span of each leaf . I have been using garlic powder mixed with water for about a year , the first time when I made my own compost and now I just sprinkle it on the top of the Coco Coir medium ; it does not seem to burn the plant and my goal was partly to increase the terpines because I love to smell terpines on weed or wildflowers .
Halman9000
P.S. I am beginning to belief it is impossible to overwater a plant and that it seems correct to flush the medium each time I water .