DANKSWAG
Well-Known Member
foreverflyhiIm sure some one else will bring more scientific researhc to the table, but from my understanding, dolmite takes much longer then oyster to actually start doing its magic,
On the other hand oystershell and other rich organics in cal mag works quicker and works in cunjuction with all the other goodies we put in our soil, not to mention ph adjusting.
my soil is about 1 year old and i used a little dolmite because thats what i had at the time, i also used oystershell and i havent had a problem, i say since ive been using this ROLS soil, i top dress with oyster/egg about once a month, some what lightly, probley less the half cup. And when i do a "heavy tea" about once every other month, ill add some oystershell, seems to dissolve well.
I found the post I meant to reference from Cann (https://www.rollitup.org/organics/673002-oyster-shell-substitute-dolomite.html#post9248117)
I've used Epsom and Dolomite lime and fish bone meal to get calcium in my soil when building out a mix for my containers or amending to address any signs of deficiency. So I haven't applied Oyster Shell before not to mention my ROLS method has not been entirely complete as it has been given in setting aside pots and growing cover crop and apply full ROLS methods in recycling for use. So this has been a fly by my pants experience as I am used to cooking soil and putting into pot for new plants as opposed to reusing the soil in pot without disrupting established soil web.
BTW the Dolomite lime I am using looks like rock salt crystals, these can be used in building soil or since they are fast acting and soluble I dissolve in water to get into soil quicker my concern with watering would with it would be disrupting any fungi activity in the soil web, though the bacteria would love it and at 22% Cal and 11% Mg I would want to water lightly this late or just add a tablespoon top dressed slight till under the soil and just water and let it slowly release. This is where Feathermeal when building soil is awesome high N with slow release calcium. But since the N is a little higher and High N directly added to soil without chance to cook first can disrupt the established soil web throwing PH off if not buffered properly. This is where Oyster Shell is great slow release great organic source of calcium and can be mixed with High N meals and guanos to buffer application to the soil keeping the PH in check.
In essence I think this dolomite lime has a place in containers at least in initially building of soil while cooking adding good amounts of calcium and magnesium.
However when building soils using High Ns like guano and various meals and their accumulation of N from those such as feather meal, fish bone meal, crab meal and alfalfa meal and the like when cooking the use of Oyster Shell or other pure sources of calcium carbonate will help keep the bacteria healthy and composting by keeping the PH in check from dropping too much during the composting processes. So I can see using light N meals with oyster shell when top dressing to amend soil that needs help would be very beneficial too.
note to self further review on ROLS and ensuring quality organic nurtirion is readily avaiable before transplanting clones into for veg and onto flower. ROLS pot must have majority needed nutrients that can sustain and be increased with teas.
DankSwag