Join Date: Feb 2007
Location: Spain + Germany
My Motorhome: Four Winds RV
Thanked 708 Times in 657 Posts
Growing media are interesting Dick.
I's amazing what will grow, and how well it will do, in what seems to look like pure stone with little or no fines or soil or even sand. Give plants food, light, air and heat and mostly they'll do just fine.
We are very spoiled with the soils we have in the UK, but a medium that is 80 or 90% stone can produce fine plants.
My company did an experiment years ago digging holes into stone railway embankments and literally shoving a variety of small trees and shrubs in to see how they did. No feeding and no water. A year later the survival rate was adequate, such that it was cheaper to plant that way and put up with the losses than it was to try filling holes with soil or compost which in time would mostly wash away anyway. Ten years later the planting had established and looked PK, if a bit stunted. I never did discuss it with a plant pathologist, but I know that his verdict would have been that it was impossible for plants to survive in those conditions.
You are right just to think of growing media, and not soils or composts. Plants will survive a lot, and thrive with additives.
I don't know the details of agriculture down south but I do know some farmers here, after covid once the pubs open again I'll ask some questions. I'll be interested. Agriculture here has been an eye opener. They farm land we'd consider to be fit only to graze sheep on. Citrus seems to grown in pure stone perfectly well so long as it's fed, watered and sprayed.
Brexiters. It's your sh1t now. Whatever happens nationally and internationally you own it. I wish you luck. I think you're going to need all you can get and then some. Friday 13th December 2019.