Crushed Limestone For Gritty Mix?

johnweh(10 Boca Raton FL)April 26, 2011

Can crushed limestone (Drainfield Rock) be used in gritty mix? I recently found some that seems to be the right size & a good price. I seem to recall reading a previous thread saying that Florida limestone was either too salty or alkaline. Any suggestions?

Thank you for reporting this comment. Undo

Limestone is primarily calcium carbonate (CaCO3)... its the source of "agricultural lime" or "dolomitic lime" that's used to balance the pH of soil mixes. In a gardening context, it's very alkaline. You something basically inert for the gritty mix, like granite, quartz, and many other silicate/clay minerals.

    Bookmark   April 26, 2011 at 8:36PM
Thank you for reporting this comment. Undo
johnweh(10 Boca Raton FL)

Could something acidic be added to the mix to neutralize the limestone?

    Bookmark   April 26, 2011 at 9:38PM
Thank you for reporting this comment. Undo
tapla (mid-MI z5b-6a)

Actually, John - the limestone reacts with the acid to neutralize it. CaCO3 is generally considered insoluble at sizes larger than 200 mesh for agri applications, but that is when adding a few pounds per acre. Using it as a primary fraction of a container media would completely eliminate the buffering capacity of the media and the pH would essentially rise to whatever the pH of the limestone is, which will be very high. There would be so much limestone that you couldn't apply enough acid to neutralize it w/o the limestone becoming soluble in the acid & being washed from the container.


    Bookmark   April 27, 2011 at 12:10AM
Sign Up to comment
More Discussions
Reusing infested soil
Last year, my outdoor container-grown kale suffered...
Lateral water movement in 511 mix under drip irrigation
I would appreciate it if someone can give me an indication...
Jacques (MP, South Africa) S
Transplanting between containers
I'm looking for a rule of thumb for proper transplanting,...
cakbu z9 CA
Testing mycorrhizal fungus inoculant in containers
So I have decided to test a mycorrhizal fungus inoculant...
What to plant in 4 1/4 Gallon Food Grade Buckets?
I was recently given about 20 4 1/4 gallon food grade...
Sponsored Products
Modern Indoor/Outdoor Area Rug: Linon Home Decor Rugs Trio Burgundy and Black 8
Home Depot
David Trubridge Design | Ulu Half Pendant
$620.00 | YLighting
Chadbourne Wall Sconce
$249.00 | FRONTGATE
True Fabrications Stripe Mod Cocktail Shaker
$12.99 | zulily
Tutti frutti tablecloth
Origin Crafts
Ladonia Bergere Chair - PARCHMENT/IVORY
$2,249.00 | Horchow
Henri Studio Hi-Tone Sea Otter 3-Tier Fountain
Lamps Plus
Siam Flower Bowl - 7.90208
$497.50 | Hayneedle
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™