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sterilized lava rock

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Old 01-28-2009, 08:18 AM
GregB GregB is offline
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Join Date: Jan 2009
Posts: 7
Default sterilized lava rock

Hi Ron!
Its me again, Greg B. in Fort Lauderdale Fl. I asked you about the lava rocks, and you suggested
that " I sterilized because of the toxins that pure lava rock has. I would water every 20 minutes or so
for 5 minutes and maybe more often." How would I go about sterilizing them? They are growing
tomatoes just great but the ph has to be adjusted every day because it goes way up. I am adding
asprins to control it but I am afraid that it will do harm to the plants. Has lava rocks got the acid 'built
in it or something? anything I can do to get rid of it?

Thanks a bunch, your friend in Florida Greg B.

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Old 01-28-2009, 08:20 AM
Ron Ron is offline
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Join Date: Jan 2009
Posts: 1,285

You can clean them with a 10 percent bleach solution or cook them in an oven at 250 degrees for an hour.
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