On Mon, 17 May 2004 19:14:16 -0400, "Mon Chi Chi"
wrote:

How can I lower PH in my indoor garden. I am at around 7.0 and I want to get
to about 5.9 for my tomatoes. I have used aquarium product before but found
it to be expensive. I am not sure what product to use that will not harm my
plants as they are for human consumption...

mon


If you add compost to your garden, the decaying matter will produce
acids. If you work the compost into the soil using a tiller, the soil
will become increasingly sour and chemicals will leach out. Acidic
materials you can add include peat moss, sulfur, or aluminum sulfate.
For your desired pH of 5.9, use 5 pounds of peat moss, 2.5 pounds of
sulfur, or 15 pounds of aluminum sulfate per 100 sq foot of garden
space. It is better to till in the additive than just spread it over
the ground. You'll need less of the additives for sandy soil and
somewhat more for heavy clay soil. Changes in pH do not happen
overnight. Test pH again in 6 months.

I've grown tomatoes for many years and never had concern about pH.
Temperature seems to be more of a problem.