Quote:
Originally Posted by solid7
If there are any actual worries about calcium - which is often present in soil in plentiful quantities - and one is inclined to stay organic, you can always add Calcium Carbonate or Citrate, (dolomite only if you need to alter PH) or even just good old ground egg shells. We keep a coffee grinder specifically for the task of reducing them to useable particle size. It doesn't take too much. Generally, just mixing a few spoonfulls around the root ball will do you for the growing season.
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Scott is talking about using 100% leaf mulch. There's no soil in that. Further, Ca levels vary from region to region. So I would use the idea of "often present in soil" with a grain of salt!
Egg shells are a great idea, if one eats eggs. Breakdown is fairly rapid in organic gardening terms.
Although Calcium Citrate meets the requirements for Certified Organic (USDA NOP), many people who garden by the organic philosophy will not accept it because the compound sold agriculturally is entirely man-made.