Lime and ph adjustment new mix

[legitness]

So I have my new soil mix
Peat cast lava compost
Alfalfa wheat bran etc

Gypsum at 1cup a cu ft
Basalt at 2 cup

Oyster flour :lime….. how much mix calls for 20 but I feel that will shoot me to 7
I have 730 litres of soil made up including lava rocks

 

[mysticepipedon]

20 cups in a cubic foot? That does sound excessive, unless the calcium carbonate equivalent of oyster shells is low. I wouldn't think it could be that low, though.

 

[KenKenaf]

20 cups in a cubic foot? That does sound excessive, unless the calcium carbonate equivalent of oyster shells is low. I wouldn't think it could be that low, though.

730 litres = 1 cubic foot. Nice math.