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Re: In-ground Planting Mix

  • Subject: Re: In-ground Planting Mix
  • From: plantnut <plantnut@macconnect.com>
  • Date: Mon, 16 Jul 2001 14:42:40 -0500 (CDT)

Dump the coir....  It will decompose within a year!!!!!

>I've dug out a modest area inside my greenhouse for an in-ground
>planting area.  After placing a 4 - 5" [10-12 cm] layer of drain rock in
>the bottom of this pit, I'll be topping up with another 18 - 20" [45-50 cm]
>worth of planting mix; as the native soil here in the San Francisco area
>is essentially clay.
>My intent is to grow a mixed collection of tropicals in this bed.
>>From Araceae: Amorphophallus, Anchomanes, Anthurium, Alocasia, Dieff.,
>Philo's, etc. etc.; some Heliconia, various Zingiberaceae, Bromeliads, Palms,
>Cycads... the usual suspects!
>Does anybody out there have any experience/ words of advice concerning
>conservatory (in-ground) soil mixes or specific materials to either use or
>I'm considering a mix comprised of locally available components which I'm
>blending at the approximate ratio of
>- 40% coir (in lieu of peat moss)
>- 30% red lava gravel (graded 1/4" size [6.5 mm], clean)
>- 20 % fir bark (also graded 1/4", clean)
>- 10% horticultural sand
>My sample of the above looks great-  but I'm really concerned what it'll turn
>into 5 years from now.  Especially since my preference is to not dig out the
>entire bed and replace the contents much before 2010, if at all possible.
>What do the under-glass botanical gardens do?
>Anything special used for the beds inside MOBOT's Climatron for example?
> -Dan

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