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Home → Publications → Tree Planters' Notes → Tree Planters' Notes Volume 24, Number 2 (1973) → Peat proves superior medium for Douglas-fir seedling growth

Peat proves superior medium for Douglas-fir seedling growth

Douglas-fir seedlings were grown for 30 days in Jiffy-7 pellets, Jiffy-7 peat, and nursery soil. One might expect seedlings to grow better in peat than soil, but the difference proved far greater than expected.Jiffy-7 pellets, small disks of shredded compressed peat, expand from 8 by 47 millimeters when dry to approximately 50 by 47 millimeters when wet. After expansion, the center hole in which a seed or seedling is planted is about 20 millimeters in diameter and varies from 5 to 10 millimeters in depth. The pellets were used in this experiment both intact and as loosened peat crumbled into small pleated paper drinking cups the same size as the expanded pellets .


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Author(s): James W. Edgren

Publication: Tree Planters' Notes - Volume 24, Number 2 (1973)

Volume: 24

Number: 2