A commercial product available in two sizes as an aggregate: fine- perhaps for odontoglossums and terrestrials, and large-sized 2.5cm.+ and sold as Terragreen which might be the most useful generally; easy to wet, contains many leachable elements; experimental with orchidists. OR82-221;392
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Arcillite
Arcillite
Comments
ARCILLITE: Calcined Montmorillonite Clay
When added to a vermiculite and gravel mix for cymbidiums has increased moisture-holding capacity by 407o and improved growth on several plants. OA81-6; Hort. sci. '81-176