Now with PTB297 Mycorrhizae, Premier Tech Horticulture offers to the Mid-Atlantic growers PRO-MIX BK25 and PRO-MIX BK55. These medium-weight, peat/bark based growing mediums are composed of processed southern pine bark, sphagnum peat moss and perlite. PRO-MIX BK25, made for greenhouse horticultural crops in 4-in. pots or larger, is a general-purpose growing media that provides good drainage and low water retention. PRO-MIX BK55 is designed for long-term greenhouse crops and perennials grown outdoors.
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