visajoe1
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That post was from 2015, perhaps he remembered by now lolYou couldn't remember the "extra" goods in crushed oyster shells, amazing ! Are you trying to neutralize an acidic condition ? Try rock phosphate 0-5_0 / 25% calcium.
That post was from 2015, perhaps he remembered by now lolYou couldn't remember the "extra" goods in crushed oyster shells, amazing ! Are you trying to neutralize an acidic condition ? Try rock phosphate 0-5_0 / 25% calcium.
Oh. Maybe someone can use this information ( very good stuff) add bat guano 0-5-0. Then you'll have short time and long time supply.That post was from 2015, perhaps he remembered by now lol
Oh. Maybe someone can use this information ( very good stuff) add bat guano 0-5-0. Then you'll have short time and long time supply.
Someone on this thread mentioned calcium carbonates are not absorbable by the plant. True? I did a quick Google, on it's own no not absorbable, but... ---> Calcium is an alkaline metal that when chemically combined with oxygen and carbonate (CO3 -2) forms calcium compounds. Microbes in the soil eat these compounds and excrete waste products containing calcium, which plants can absorb.Hard water is my favorite source of Calcium
My well water has around 75ppm in it which seems to be about perfect...and it's free.
You shouldn't need to add any calcium if your water has at least 60 ppm.
Note that all organic sources of Phosphorus are very high in calcium.
I use oyster shell and white viniger.if you use apple cider you need to boil before extraction. The mother in the apple cider will make your solution skanky.a "dead" viniger works much better. The bacteria and microbes in fruit vinegar react with the egg shells or oyster shells in negative way.I have been thinking about experimenting with crab shells and apple cider vinegar at a 1:5 ratio for 5 weeks to make some CalPhos. Anyone try this before? Should I skip the crab and just use oyster?
The carbonate will lock up phosphorus and magnesium...I know, my tap water is high in calcium carbonate. been going through a lot of stress for 2 years wondering what the heck is going on with some of my flowers. Now I'm almost 100% positive it's the calcium carbonate build up in my soil. I'm now filtering the water with a RO unit. My dry amendment pack has Gypsum in it.Yeah so this is quite an old thread and prior to me diving into the calcium world of growing. I am 100% in favor of gypsum as the main source of calcium for soil. Calcium carbonates require an acidic soil in order to free up any calcium and it drives pH up higher than you may want and the carbonates can lock your magnesium up. Will it work? sure and it has for years but it often takes years if not decades to disolve depending on the pH. Gypsum is cheap, easy and the most effective bar none for cannabis. 1 cup-3cups per plant. Anything above that begins to add problems so I would go with two full cups of gypsum.
I've learned a few things since my last post (March 6th). The Dolomite Limestone is better used on the initial mix of your soil (it has a longer span of time to breakdown during the cook). It's not that good as a top dress because the calcium in it does not break down as fast. I'm guessing the gypsum is a better option as a top dress. Most proprietary products use Gypsum instead of the Limestone (probably for that very reason).I've been using gypsum and it seems to work well. Every few weeks, I add a tablespoon along with some other amendments to some soil and top dress before watering.
Where are you getting gypsum from? I want to ensure I’m not getting stuff loaded with anything toxic that might’ve been introduced from a mass manufacturing process. Anything a big box store sells automatically comes to mind, whether it’s true or not.I've been using gypsum and it seems to work well. Every few weeks, I add a tablespoon along with some other amendments to some soil and top dress before watering.
Where are you getting gypsum from?
Down To Earth Gypsum. Have a box of it I haven't even opened yet..