submit a soil sample for testing:
-Collect 300 ml
soil- (approx. 1 quart-sized zip-lock bag) from within the root zone of
the plant of concern
the sample in a plastic bag. 'Zip-lock' or 'Whirl-pak' bags work well.
do not use paper bags, they do not hold up in shipping.
samples out of direct sunlight and cool until they can be shipped.
as soon as possible, but soil samples do not need to be overnight mailed.