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Discuss water requirements, "soil" (growing media) and suitable planting containers

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By kronos1996
Posts:  515
Joined:  Thu Sep 13, 2012 2:23 pm
#439039
I’m trying to calculate how much Sphagnum I need to order to fill my new pots as I prepare to restart my collection. Unfortunately most of it comes as dried, compressed blocks and there very little information on how much volume it’ll occupy wet in gallons or cu/ft.

I’ll be using 12x12x12 white square pots this time which hold ~6 gallons of media. I know sphagnum varies in mass so there’s some uncertainty, I just need a range. Starting with 6 pots but may get more. Gonna need lots of sphagnum. Trying to hunt down good deals.


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By ChefDean
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Posts:  9085
Joined:  Tue Sep 18, 2018 12:44 am
#439041
It varies with how it was processed by the supplier. I've seen it come vacuum sealed in plastic so that it doubles in volume when released. I've also seen it mechanically compressed so that a brick about the size of four iPhones (side by side, two deep) contains six liters when rehydrated. Maybe the packaging of whichever you're looking at will tell you.
By kronos1996
Posts:  515
Joined:  Thu Sep 13, 2012 2:23 pm
#439046
optique wrote:this is 240L
Image
Ok cool, how much does it weigh? That seems to be the way most brands measure and sell it.


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By optique
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Posts:  1853
Joined:  Fri May 24, 2019 11:15 pm
#439047
Spagmoss brand
Pack sizes available for standard dried moss:
150 gram = 12L / 3.17 US GAL when hydrated
500 gram = 40L / 10.57 US GAL when hydrated
1 kilogram = 80L / 21.13 US GAL when hydrated
3 kilogram = 240L / 63.4 US GAL when hydrated
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By nimbulan
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Posts:  2394
Joined:  Fri Feb 28, 2014 9:03 pm
#439048
Keep in mind that the ratio of weight to volume for these packages may not be directly comparable to other brands, since there will be differences in both moisture content and the dry weight density of different Sphagnum species.
By kronos1996
Posts:  515
Joined:  Thu Sep 13, 2012 2:23 pm
#439049
Yeah I expect same variability. I decided to get a 4.4 lbs bale off Amazon. For $50 I won’t be too mad no matter what. Supposed to make ~21 gallons wet. I’ll evaluate it before getting more.


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By nimbulan
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Posts:  2394
Joined:  Fri Feb 28, 2014 9:03 pm
#439073
davinstewart wrote:Just buy the $140 bale of Chilean sphganum moss from Josh's Frogs and you'll never have to buy sphagnum ever again!

[Edit] Oofa, when I bought this it was $80. Ouch.
Yeah I'm really glad I'm still working my way through the huge amount of moss I bought a good 5 years ago. I'm not looking forward to having to buy more in the future.
By kronos1996
Posts:  515
Joined:  Thu Sep 13, 2012 2:23 pm
#439115
davinstewart wrote:Just buy the $140 bale of Chilean sphganum moss from Josh's Frogs and you'll never have to buy sphagnum ever again!

[Edit] Oofa, when I bought this it was $80. Ouch.
Oof Yeah, everything’s so expensive now. That’s about the going rate for Ebay sellers too.


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