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I purchased a 28" long x 16" wide x 16" deep white plastic flower trough (it has two removeable drainage plugs if I want to flush the soil later on). I want to plant sarracenia, sundews and VFTs in it. But I'm curious as to when I should plant them in the box? Is it ok to do it now or should I wait until mid winter when they're in their dormacies?

I will grow the box outside from about April til November and then in a cool north western window overwinter (to give them a dormancy).

Here's an actual list of the plants (and their sizes) that I want to put in there:

2 D. intermedia 2 1/2" diameter
1 D. binata various length arms
2 S. alata  3" H
2 S. flava  3" H
3 S. purpurea  2-3" H  (all 3 ssp. varieties)
2 S. rubra 3" H
3-5 VFTs from 4"-8" high
1-3 P vulgaris (If I ever find a supplier with real P vulgaris)
I'm trying to decide if I should try a Phragmegenium orchid in there too...


My thoughts on a soil mix is:
1 part sphagunum peat
1 part sand
1 part long fiber spahgnum
(with of course a top dressing of living longfibered sphagnum)

would pearlite be better to use than sand? With sand added it always seems such a heavy mix, I would think pearlite might be better for the roots to penetrate through but I really don't know which would be best. I know pearlite would be better for my back lugging the thing to the house every fall)!  
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I'm thankful for any thoughts!
 
Swords,
I am actually planning on doing something similar next year with my window box (about 2' by 4" by 6") out on my deck railing. I don't see why it wouldn't work. In my case, I am going to have to be a little more active with the water (the tray isn't very deep compared the depth of the pot), but that's no problem....more time with the plants!
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Swords, I'd go with the Perlite for two reasons. First it's a lot lighter than sand and second it's porous and will help hold moisture in the soil better than sand would.
 
Pearlite is lighter
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but it also floats to the surface and makes a mess in an outdoor bog
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. Instead of moving it eackh season you may want to consider making a portable cold frame to place over it in the winter to give it added protection.
 
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