Outdoor growing and fertilizers/manure

[WillWeed]

Hello, swim has done this mix:

Old cow manure rich in earthworms (5L) + Coco (5L) + Biobizz premix (a couple of handfuls) an inoculator of bacteria and mycorrhizas. All mixed with like 5L of the original soil (clay and limestone texture, that's why I added coco).

Is that a good mix? Do you think I should correct in any way? I don't really know the ph cause my sensor is broken.

Thanks you guys

 

[Weedninja]

Mixing coco with soil is a bad idea. Sphagnum is a better and cheaper option. That's probably too much manure. I'd start with 2 or 3L and adjust from there: It's a major pain in the ass to adjust an organic mix that's too rich, but it's easy to top-dress and add nutrients.

You'll also want to add sources of potassium and phosphorous. Bone meal is a good choice for the P, and either greensand or molasses for the K.

 

[WillWeed]

Hi, thanks for the answer, isn't sphagnum too acidic, I chose coco for its more basic ph?

I chose not to add NPK integrators, thought that manure would be sufficient, do you think they are needed?

What about percentages? Like 15 9 15 NPK during growing phase and 15 30 15 NPK during flowering?

 

[Weedninja]

The problem with manure is that the NPK can vary wildly. Pardon the pun, but if you get a batch that's rich you'll be in deep shit. That's why I suggested dialing it back and going with more reliable additives.

Plants in coco have different pH requirements than plants in soil. I've seen people have big problems mixing the 2. Yes, sphagnum is acidic, which should balance out the alkalinity of your clay/limestone.

Nitrogen in flower is correlated with low potency, so ideally you'd use it all up in veg. There's no exact number set in stone, but this is about what I go for:
15-5-5/grow and 5(max)-20-15/flower.