Sulphate of Potash
Thu, 15 May 2008 00:07:36 PDT
From: Judy Glattstein <>
Date: May 14, 2008 11:58:45 AM PDT
Subject: Sulphate of Potash

Just from curiosity I e-mailed John Harrison at Espoma, asking about  
sulphate of potash. Here is his reply.


Thank you for your mail.

Bulbs like all plants are best fed with a complete plant food rather
than a single ingredient. We produce a product called Bulb-tone that
will provide all major, minor, and trace nutrients required.  A fact
sheet is attached.

Sulfate of potash (SOP) is a mined mineral with an analysis of 0-0-50.
It is generally considered an acceptable input for organic gardening and
agriculture. It is superior to the muriate because it is lower in salts
that can harm plants (particularly tender emerging roots of bulbs).
We no longer produce the SOP as a single ingredient.  We do use the
material as a potassium source in our blended plant foods.  We do have
the muriate, but plan to discontinue that as well.

Judy, the ever-curious in New Jersey

More information about the pbs mailing list