High there!
I'm using FoxFarm's (Bushdoctor) Coco Loco potting mix. Some things about this I noticed:
- Coco coir base is heavily amended (with mostly great stuff, bird guano, bat guano, kelp etc.)
- It is also AMENDED WITH PEAT MOSS,
saw fit to blend coco and conventional peat, forest humus, perlite, and vermiculite.
- Mycho... Mych... the good fungus. It has it.
- Gentle enough to grow germed seeds or rooted clones.
- Amended enough to feed for the first 2 or 3 weeks.
- It DOES lose volume over time. That loss is mitigated by the coir. About half as much as Pro-Mix, maybe even less.
- It is amended with pH and calcium buffers. I'm not taking any chances and feed .5tsp/gal of Earth Juice Elements Cal-n-Mag with every feeding.
- It behaves like everything else that I've read about Coco and I pH what I feed to 5.8 (FoxFarm Grow Big Hydro, Big Bloom and Tiger Bloom)
- Up to mid grow I can feed or water to 10% runoff every 3 days (to give you an idea how quickly it dries). According to what I've been reading in this forum, however, I believe feeding once to run-off per week (to take care of buildups) with multiple frequent smaller feedings throughout the rest of the week might give more hydro-like results!
- I see a 50-100% increase in plant to pot size vs. Pro-Mix and way more vigorous root growth. That's without the aggressive micro-feeds I just mentioned.
- I think it could use more perlite and/or vermiculite for autos. I added 1/3 Miracle Gro perlite to 2/3 Coco Loco once (didn't like that the perlite had nutes but it was the only kind I could get at the time), and the plants loved it. Didn't even burn babies but that may have been dumb luck.
My conclusion is that FoxFarm has done most of the work for you and with minimal tweaking Coco Loco is a respectable medium. By all means mix your own, find your sweet spot, but if you have limited time and space like me, this is a good alternative that should be compatible with most other coco advice here. I've completely switched to planting anything for flowering in Coco Loco. I still dig into that white and orange Pro-Mix cube to plant mothers that will stay in veg for a long time (because it's just bomb-proof).
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n2p2k