Heard Plagron is the whip. And yes..not many in America grow in coir slabs but it is tue way for sure.So we've pretty much run it ALLLL... Canna, atami, botanicare, nutriplus, nutrifield, Cyco, sunleaves, roots organics, sunshine, sanctuary, GH, fox farm, mills, plagron, Mother Earth, royal gold, gold label and probably a dozen others that aren't coming to mind right now..
Gotta say our favs are definitely the Plagron w perlite mixed and the Mills w the pre mixed cork. Nutrifield amended w perlite close to the top of the list too. Growing on slabs Plagron is DEFINITELY the way to go.
Definitely recommend amending coco with something to aerate, dropping ppm of feed and watering more frequently. This gives you hydroponic growth rates and the forgivingness of coco. We're doing our first run of Plagron nutes in Plagron coco and CRUSHING it.
Black Gold Coco is cheaper in price but not quality. Back in the day thier soils amd mixes were the bomb. Alot of old timey growers used black gold.Same with Metro Mix and Bactto.Take this for what it is I'm doing a run with Canna coco vs cheap ass Black Gold coco
All cones from same mother plants WIFI OG
All in 10 Gallon Smart Pots
All in same room
All vegged in same room same length of time
All temps, C02, All HPS 1k Flower Bulbs, 1 K Veg Bulbs,
All feed from same Rez of nutes hand feed same amounts of nutes
And I seen not one thing different other I have one plant that has a little burnt on the outer leaves only one in the whole room and can you guys guess what coco its in ???????
and with the black gold I have little left in each bag to start to fill next 10 gallon, with the smaller canna I use a whole bag plus a little out of second bag per 10 gallon.....This is my experience.
Went to grab some coco at the local spot the other day. All they had was Aurora Innovations Cocopalms. While I potted some seedlings the other day with it I noticed it had some small rocks that break into dust. There are not very many and at first I thought maybe they were just small clumps of dirt that accidentally got mixed in as the bag itself says it's 100% coco. Went to the website and the description says "Washed and age cured coconut husk, buffered with uncalcined limestone". Well I don't think it will make much difference. It's some great feeling coco with a good amount of air to it but I think the uncalcined limestone should be more clearly stated on the bag.