I was planning on new soil each grow, old can go in the garden or such. I’m trying to get through the entire grow without adding anything but water (I mean normally, not absolutely). If I mix rabbit manure (N 2.4, P 1.4, K .6) in with either Miracle Gro or Fox Farms before filling 3 gallon grow bags do you think it will see me through? Auto flower plants.
I would go FF. Miracle Grow contains contains time-release nutes that nuke your plant and submarine your pH every time you water. Some people get away with using MG, but most don’t and end up having to deal with nute burn.
You might have some NPK in your mix, but it’s not enough. You plant also needs micronutrients (Sulfur, calcium, magnesium, copper, boron, zinc, and so on…) supplementation that won’t be present in sufficient levels after several weeks using a Fox Farm or similar products. Good fertilizers such as FF or Jack’s contain these additional nutrients.
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Yeah , I second that 
go with Fox farm or other proven cannabis friendly soil.
I would imagine the rabbit manure would provide micros, no? With auto flower plants, just need to make sure have enough to not run out before say 12 weeks. I see “amendments” that appear to be mostly adding "flora and fauna to the soil mix. https://smile.amazon.com/gp/product/B07TRYL6K7?pf_rd_r=VKZE3M7Y15YT2W7TD020&pf_rd_p=8fe9b1d0-f378-4356-8bb8-cada7525eadd&pd_rd_r=1251dfb9-49df-4e23-b91b-ea048c69b571&pd_rd_w=vBAkF&pd_rd_wg=kQI1o&ref_=pd_gw_unk Total waste of money?
I agree rabbit manure be great. Figure your organic out, look other places to do your own. You will end up spending more money in the marketing ploy of people that can’t figure out their own growing techniques and rely on consumer based products. Let me explain how Fox Farm leads you to buying one product to the next. If you read their Grow Big ingredients, you will see they list Sodium Borate, which can kill a plant at high levels, not only that likely kill your beneficial microbes if you inoculate with Mycorrhizae (which is in worm castings by the way already in addition to humic acid also marketing ploys) or if you manage Azospirillum which reduces the need for nitrogen. Also believe they add salts, which leads you to buy their yucca flush/ A.K.A their product “SLEDGEHAMMER” …In the end you will have plastic bags, containers, and hundreds plugged in to grow a plant. Not saying Fox Farm doesn’t work great, but I think to be truly into organic growing you have to do your own research with what you have. I would love some rabbit poop in my compost mix myself, been thinking about propagating meat rabbits.Honestly I want a Fox Farm refund. WTF put sodium borate into your product?
Rabbit poop is the best .Our garden has been very strong since we started using it . We make a weak tea also soaking a few handfuls of rabbit poop overnight .and water it in at morning we do it daily 1 time a week we add kelp meal to the tea. We only fertilize with more rabbit poop and alfalfa pellets/Horse feed . Our plant grow strong
Even our tomato plants