Bryant RedHawk wrote:Any pine cone will work for acidification of soil. I've only tried the dry, opened ones (easier to shred too) and over a 3 month period (application to testing pH) the pH went down .5 (6.8 moved to 6.3), not a bad result for a free amendment.
Over a two year period the test plot remained fairly stable as the cone material decomposed.
The test plot was 8' x 8' square with enough cone pieces placed on to cover the area 1" thick before they were forked into the soil.
Averaged pH at start was 6.8 a second reading was taken 90 days post application and the averaged pH was 6.3. No further amendments were made for the test period.
tests were run every 90 days for a period of two years, the last test of the trial period showed an averaged pH of 6.38.