Quote Originally Posted by GaGrown
I grow in soil with a drip system, I would say 6.8 and 7 being high,that would be a safe range. What does the manufacturer suggest you to keep the ph?

Ga Grown!
It's probably best not to guess about something as important as pH. There are a couple of us coco growers on the forum and someone will come along with the correct information before too long.

Wheatie: Coco is a hydroponic medium, so you use hydroponic values. Your water/nute solution should be pH 5.7 throughout your grow. (For pH 5.7, 5.6 or 5.8 are acceptable. Just keep it in that range.) You can tweek the pH a little in the last four weeks of flower but, instead of confusing the issue now, just wait until you have four weeks left, then ask again.

Mix your nute solution however you mix it, adjust the pH to 5.7, douse your plants until you have about 10% runoff - if you pour on a liter, 100 ml comes back out of the pot. The 10% runoff doesn't have to be exact, but you want to flood the top part of your pot so that the coco gets a good flush all around each time you water. You water at least once a day. When the plants really want to grow in veg and for all of flower, I water twice per day.

Unless you use either Canna or Biobizz coco, I'd wash the coco with many gallons of fresh water to get all the salt out - just use water from the garden hose for rinsing. You just want to make sure you get all the salt out. EVERY hydro store clerk in the world will tell you that their coco is from inland and not salty but most of the time they don't know where it's from and it IS salty and you need to wash all that salt out.

I'll quit rambling now.

PC :smokin: