Can anyone give me an idea how much perlite I'll need for the ProMix BX??
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It isn't critical. About 1 cubic ft. should get you in the zone.
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Can anyone give me an idea how much perlite I'll need for the ProMix BX??
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<raises hand> The promix HP has ~27% perlite. Last time I checked it was about 6 gal of perlite added to BX to get roughly the same ratio as HP.
edit
1 bale = 3.8 cu/ft
3.8 cu/ft = 28.46 gallons
28.46 x 27% = 7.69 gals
So, 6 gals of perlite to a bale of BX will give roughly 21% PLUS whatever small amount is already in the BX
Found it..
So what if I can only get the 2.8 size, can I add three or 4 gallons of perlite to that to 2.8 of BX to get the 3.8 I need?
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I was gonna say, the 3.8' = 6.2 cu-ft when uncompressed according to the Promix people. Like Gray, I go by weight since the stuff can be loose or partially packed. The 2.8' loose is just slightly less than half of the 3.8' compressed. Also BX has a fair amount of perlite in it already = 12%. Promix HP = 30% perlite. The big difference is, BX has 5% vermiculite for water holding.
If you take the difference in perlite between the two versions (30% - 12% = 18%). 6.2 cu-ft. x 18% = 1.1 cu-ft. That's how I came up with 1 cu-ft. YMMV
So how about 2 bags of 2.8 and 6 gal or perlite. I feel like that will work but I need some semi confirmation from you all. Thanks so much by the way to all who have posted a reply.
And the 2.8 would need about half of that 1.1 cuft, so that'd be in the 3-4 gallon range.
Bingo.
Where did you source your Promix?So I picked up the 2 bags @2.8 cuft of the Promix BX. I'll pick up 6 gal of perlite soon. Placed my order with Doc and I can see everything coming together slowly but surely.
Thanks to everyone that helped my figure out what I needed.
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Where did you source your Promix?
She's not over-watered is she?
Is it possible to get a look at the roots?
Looking at the roots would be problematic. I have the pot filled to the max. I'm fairly certain I've let her dry completely between waterings up to this point. You guys trained me pretty well to let them begin to droop, and the weight of the pot at drench suggests I was waiting long enough once she got flipped.
Incidentally, she's 91 days now.
Sue, she's in 100% Doc's HB soil?