newton wrote:When I want raise the PH of my potting or soil mix I add a mixture of washed beach sand, composted sea weed and wood ash.
The sand contains silica, seashell calcium etc.
The wood ash has a naturally high PH range.
The sea weed provides natural growth hormones like the Gibberellins and its PH drifts upwards.
Crushed Eggshells added to compost provides a calcium additive and also increases the composts PH range.
Please let us know how you get on
Ifzal sb (Newton), that is a wonderful suggestion! Woodash and eggshells, what a good suggestion: Wood ash is mainly potassium carbonate and egg-shell is 99% pure calcium carbonate :-). Both are perfect for neutralizing acidity.
If the original poster is looking for organic solutions, then nothing can be more organic than above.
To redeye: Why are you worried about soil acidity? Have you measured the actual pH of your soil?