Guide lines for outdoor patios (equivalent to greenhoue floor):
4-6" of crushed rock, tamped down,
then 4-6" of sand, tamped down,
then pavers.
In the greenhouse, where floor won't be subject to freeze/thaw cycles, you can get away with less.
__________________
Kim (Fair Orchids)
Founder of SPCOP (Society to Prevention of Cruelty to Orchid People), with the goal of barring the taxonomists from tinkering with established genera!
I am neither a 'lumper' nor a 'splitter', but I refuse to re-write millions of labels.
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