It looks like you have the space and time and ingredients.
As a suggestion for making your own amendments, you could consider making up some
nutrient charged biochar.
1. Burn wood in the absence of oxygen to make activated charcoal
- a process called pyrolysis
2. Nutrient and microbe charge the activated charcoal
- by leaving it in your compost heap for a year
- or more quickly with earthworm castings
- or lawn cuttings or even urine (animal or human)
From what I have been reading, the charcoal burnt and prepared this way:
- has a massive surface area
... one hectare of surface area in a single handful
- it is a good promoter of oxygen in the soil
... a replacement for peat or coir or vermiculite or perlite
- it absorbs nitrogen from the compost and stores it 'like a battery'
... it releases the stored nitrogen 'on demand' by microbes in your soil
- it absorbs water when the soils it too wet
.. it releases water when the soil is too dry
- it also captures toxins and heavy metals
There are lots of articles on this ... mostly a lot of New ! Improved ! Commercial ! Products.
Here is a good place to start on the D.I.Y. path:
How to Make Biochar and Use It to Supercharge Your Garden Fertility
Biochar may hold the key to reducing green house gases, improving garden yields, improving soil structure and water retention, and more.
joybileefarm.com
Cannabis Production: Incorporating Biochar in and out of the Pot
Biochar, the carbon-rich material left after biomass pyrolysis, can become quite useful in horticultural settings when chosen and used properly. In the cannabis industry, growers are continuously looking for products to increase productivity and quality, and we think biochar could fulfill certain ne
www.linkedin.com
NOTE:
Plain ordinary charcoal will
leech nitrogen out of your soil.
It
must be charged first with nutrients and microbes.
I am trying this now myself for the first time in my current Southern Hemisphere outdoor grow.
I activated my charcoal by
- stuffing a few stocking in a 50:50 mix with black soldier fly frass
- then soaking the stocking sausages for 2 weeks in 20 litre de-chlorinated water drums
- which had been fermenting for 2 weeks prior with home made lactobacillus and a few handfuls of earthworm castings and
1. foraged thistle plants
2. foraged dandelion and curly dock plants
3. fresh green lawn cuttings and 5-10% urine
I then emptied the soggy contents of the stocking sausages into a mulch mix made from my own garden waste compost heap and fluffed and stirred that up by hand.
I will be using that for top dressing my outside plants in pots over a layer of ewc.