So I've been reading up alot on organics and have decided to go all organic this year. i've decided to use coco-coir & an organic potting soil as base. I have read that coco coir is prone to calcium & magnesium deficeinties due to the micro-organism break them down fast. I also read that it is still possible to burn plants with organics. So I've set up a couple of soil formula's one for veg and one for bloom. If some could tell me if there seem good or totally wrong. First the veg soil formula: 30% Coco Coir 30% Organic potting soil 15% Perlite 15% Feather meal(12-0-0) slow release Nitrogen 5% Green Sand (0-0-3) Slow release potassium & small amounts of trace minerals 5% Oyster shell lime (ca 46% & mg 28%) Also raises ph Blood meal tea standing by for a fast release nitrogen. Bloom Soil Formula 30% Coco Coir 30% Organic Potting Soil 15% Perlite 20% Rainbow mix bloom (1-9-2) A mixture of Bat Guano, Sea Kelp, Steamed Bone Meal, Langbeinite, Soft Rock Phosphate, Feather Meal, Cottonseed Meal, Natural Potash with mycorrhizae As far as the vegatative formula goes it seems all my nitrogen is slow release. I'm not sure how slow, slow really is. Also do you think the oyster shell is necessary due to it being mixed with the potting soil. I'm worried about the ph being raised to much and locking out nutes. As far as the bloom formula I think I'm pretty good there. The only thing is I'm going to be vegging inside 2 months then move them outside to finish vegging and flower and it seems my bloom formula is really lacking in nitrogen. Should I add a high nitrogen tea to the bloom formula? Any help on this subject would be greatly appreciated. Thanks guys and gals.