The brand I used is Ferti Organic
Hmm if only people were as quick to help as they are to hate here.
If you read the original post I was saying i wasnt sure about the question of a substitution of gypsum. Never used oyster shells.. but I'm taking a page out of B1's manual and saying GET THE DOLOMITE!!
Take v everything you read here with a grain of salt though.. even from the"guru's"
Maybe if someone else chimed in my pothead ass wouldn't be trying to help.
"I just got back from a ride in the country to clear my head and I was thinking about the best way to help you with the calcium deal.
Here is a rundown on liming agents in general and what they contain.
1. Limestone - calcium carbonate
2. Dolomite Lime - elemental calcium (Ca) and magnesium carbonate
3. Gypsum - elemental calcium (Ca) and sulphur in a the form of S04 meaning that it is elemental sulphur with 4 oxygen molecules attached which is important in the CeC paradigm.
4. Oyster Shell Powder - calcium carbonate (CaCo3) - This product is not what it would appear from the name, i.e. it's not a product made from crushed oyster shells but rather it's a particular oyster shell mined from the San Francisco Bay from ancient sea deposits made up of very tiny and fragile oyster shells.
5. Crushed Oyster Shells - calcium carbonate (CaCo3) and this product is made from crushed oyster shells.
As you can see, all of these liming agents either contain elemental calcium or calcium carbonate and it's the calcium which is used to correct acid conditions in a soil.
The reason that I do not recommend using dolomite lime is that it contains 2x the amount of magnesium vs. 1x of elemental calcium. That isn't to say the magnesium isn't important - quite the opposite it's extremely important but magnesium has absolutely nothing to do as far as a liming agent.
Excessive magnesium will cause soils to bind up making it difficult for the plant's root hairs to move through the soil to exchange their hydrogen cation (+) for minerals, macro and micro nutrients.
In plant-based soil amendments like alfalfa meal and kelp meal, a review of the levels of calcium vs. magnesium show that it's 4 and 5x - quite the opposite of dolomite lime.
Calcium carbonate is water soluble while magnesium is not. You can use this to your advantage by using limestone in water as part of your irrigation program. I'd recommend about 1 tablespoon per 1 gallon of water. Stir, shake, stir, shake - then apply. This will provide your plants with the amount of calcium necessary to maintain health and growth vigor.
Crushed oyster shells is also pure calcium carbonate. It can be dissolved in water but that can take several days/few weeks. This is the product that chicken growers feed to their hens both for the calcium content (to insure strong egg shells) but also for grit used the hen's gizzard to digest grains.
Oyster shell powder is pure calcium carbonate and is instantly dissolved in water.
You can use apple cider vinegar and soak the crushed oyster shells to extract the calcium carbonate. By volume you would want to mix 1x crushed oyster shells (or egg shells) with 3x apple cider vinegar and let it brew for 2 - 3 weeks. The vinegar will extract the calcium from the eggs shells in a concentrated form. Mix 1/4 cup of the vinegar with 1 gallon of water and apply to your soil.
And if you take egg shells and put them into a large pan with your Weber BBQ fired up and heat them until they turn every shade of dark brown to black and then take them and crush them and do the same deal with the crushed oyster shells, you'll end up with calcium phosphate. Apply at the same rate noted above for the crushed oyster shells. You can also process the crushed oyster shell the same way - heating until charred and then distilling the calcium out with apple cider vinegar.
While it's true that the good ol' N-P-K deal dominates the cannabis growing meme, in the world of soil science the basic study is often about the building-block cations: Calcium (Ca+2), Magnesium (Mg+2), Potassium (K+1) and Sodium (Na+1) and the acidic cations, Hydrogen (H+1) and Aluminum (Al+3)
HTH
LD "
bamboogardener: are u actually growing bamboos? what species?
We have golden bamboo here.
It hates the winter time but seems to want to live.
Are there any very cold hardy types that can then handle lots of dry heat?
next up is a 250 gallon tote brewer...
I am after himalayacalimus species at the moment. Azulis in particular. Blue Himalayan Bamboo.
Better start than most have their first time around. Good luck and looking forward to some updates.My first attempt at this outdoor thing (first time in dirt as well). This will definitely be a challenge adjusting/adapting and figuring things out but luckily I found this "cheat sheet" of a thread.