In article , Dwight Sipler
writes:

jhultman wrote:

Prompted by poor size on the tomatoes...

I bought a soil test kit and found that PH is 6.5 7.0 = Generally
Acceptable.

P and K were high but N is depleted. Which explains the poor fruit
sizes?...



First of all, the home soil test kits are notoriously inaccurate in the
nitrogen determination. The most accurate is probably the pH test.

Second, you don't necessarily want to boost the nitrogen to your
tomatoes too much. You will get lots of leaf growth and little fruiting.

The best thing to do is to send a soil sample to your local extension
service with a cover letter telling them what you are trying to grow.
They will be able to make specific recommendations for fertilizer. Call
your local extension agent to find an address for their test lab. A soil
test should cost around $10-15 for the basics. They will tell you how to
take the sample and dry it (no point in shipping water at postal rates).

Good advice, Dwight, except Coop Ext. in Calif does not do soil tests
It is necessary to contact a soil testing lab on your own.

Emilie