lava rock in clay pots. they grow pretty vigorously. they usually bloom.
i have a baby stratiotes that's in a mix of sphag/aliflor at the moment; over the summer that will probably go into bark/aliflor, and then next year (provided it's bigger) into lava/aliflor and then plain old lava when it's big enough.
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"Apart from the utility of binomials for standardizing reference for effective communication,
Laelia Speciosa is a tad easier to pronounce and spell than its Atzec name
chichiltictepetzacuxochitl."
--Alec Pridgeon