kelp and seaweed for K...no shortage of it where he is...cheerz...
...h00k...
This ^^^^ Dont forget some hardwood ashes. always a good addition specially if you can get some black chunks of charcoal to go with. Prolly can find some decent wood to burn near the sea. Start a fire ... pot-ash FTW.
@Weaselcracker congrats on your harvest.
Regarding soil pH
7pH is on the high end. Any higher you start getting lockouts.
I use just straight up CSPM - its cheaper and better IMO and its acidic which is fine when you amend with Ca which you should be doing in the soil mix.
The reason for soil pH to be lower or slightly acidic is this.
As the soil organic matter breaks down the pH naturally rises during the break down process. In nature that gets TCO's by acid rain. Rain water will always be acidic.
You can temporarily help the soil pH if its high by adding some acid to your water. Not THAT acid an acidic source like ascorbic acid.
So the reason to get started with acidic soil is that over time the pH rises. Longer than 1 grow (I recycle my soil). But it always rises.
Adding fresh CSPM will help as well.
On the acid rain thing. It's been a thing before hoo-man. Our atmosphere was sulfuric acid at one point that's pretty acidic and why our planet is 10% sulfur. The acid in the atmosphere much of it comes from natural geologic processes on the earth surface both under sea and on the surface via volcanic activity. You will see a lot of sulfur coming out of volcanoes. Its an element, give it some heat (plus 400C) and vola acid rain.
Acid rain breaks down the rocks formed by volcanic activity, creating clay that contains minerals and nutrients from the rocks. Rivers move the clay .... and round and round we go.
Clay is very important to horticulture. Its basically rock dust that has compacted and chemically bonded to create clay particles waiting to be broken down further by bacteria and fungi that help grow plants. Round ball... heat up the clay and sand create more rocks..... Then there's the sedimentary rocks. lol
BTW glad I stopped by interesting discussion.
@Weaselcracker with that forest in your back yard, just go get some leaf mold and some worm castings. You got GOLD in dem der hills brother. Why you messing with mega crop??