Re: rocks
- Subject: Re: rocks
- From: "Marge Talt" m*@hort.net
- Date: Sat, 7 Dec 2002 01:59:16 -0500
Very good point, Frank, I had not thought about the mineral angle.
Do you happen to have a list of those plants who will only germinate
in rock?
Marge Talt, zone 7 Maryland
mtalt@hort.net
Editor: Gardening in Shade
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> From: gentian21 <gentian21@insightBB.com>
>
> Another reason why plants like rocks is for the minerals. Many of
the
> dryland plants that are hard to grow will grow great if the are
given
> mineral supplements. Minerals also increase drought and cold
tolerance.
> Where there are a lot of rocks the temperature is much more
constant that
> soil. A gravel mulch helps but if there is rock underneath it is
more
> significant. When there are big rocks the root tips can touch the
rocks and
> catch rainwater or dew that forms on the surface rock. That is why
plants
> like rock ferns actually require hot rocky places. Many seeds will
only
> germinate if they fall between stones.
> Frank Cooper
> central Illinois zone 5
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