Gritty mix - New Zealand question
I'm based in Auckland and am keen to try Al's legendary gritty mix.
I can't find some of the ingredients so wanted to some experienced views on best substitutes.
Options I have in addition to the pine bark (1/4 to a 1/2 inch) and peat are:
Fine scoria -
Nutrifield Clay balls (hydroponic)
Can I ask what of the above would be best used for both the 5-1-1 or the gritty mix?
My use is solely potted citrus trees in an outdoor setting with full sun.
Also in terms of size I understand its ok for the bark to be a little larger than the other materials in the mixes. Is 1/4 to 1/2 ok or is that getting to big?
Also for the other materials they are all 1/4 or a bit smaller. Is that ok?
I understand that these options or sizes might not be perfect but hopefully they will be able to produce a mix which is better than my current off the shelf heavy peat based potting mix.