Arisaema ringens 'Puto' How deep to plant bulb? & beneficial Nematodes

From: jbauer at concordnc.com on 1999.10.29 at 15:54:52(3801) Hi Aroiders, How deep should I plant Arisaema ringens 'Puto' bulbs? 'The American Horticultural Society Enclyclopedia of Garden Plants' 1990 suggests 6 inches deep. It has never bloomed since I purchased it in 1993. I believe that I had them planted too deep plus in too much shade. Also has anyone had any experience with beneficial Nematodes which would get rid of weevils, borers, fleas, grubs and root-knot? Do I wait until next spring to apply beneficial Nematodes after the ground warms up to about 50 F? Who is a reliable source of beneficial Nematodes? Where do I place an order in advance since beneficial Nematodes have to be lab grown? I used the Milky Spore last year for the Japanese beetles. Thanks for your help, Judy Bauer +More US plant zone 7 Charlotte NC area

Note: this is a very old post, so no reply function is available.