← Elaine Ingham · Research and publications
Compost in place of peat: a trial with ornamentals
A conference contribution examines links between feedstocks, compost quality and the growth of container plants.
Conference abstract published:
From feedstocks to growing media
Two feedstock mixtures were composted aerobically. The finished compost was assessed for chemical and biological properties and used to replace peat at 0–40% of total growing-medium volume. [1]
The plant response
Growth of the tested ornamentals in compost-containing media matched or exceeded the control. Feedstocks affected the finished product’s chemistry. The findings were published as a conference abstract. [1]
Quality before a recipe
For a nursery, compost selection starts with the properties of the actual batch. Maturity, conductivity and pH help shape a medium suited to the plant and irrigation water.
A practical follow-up
A small trial of different proportions can record rooting, growth and flowering. This gives peat reduction a measurable foundation under the nursery’s own production conditions.
Sources and references
- Highland, M.T.F., Sclar, D.C., Ingham, E.R., Gartley, K.L. & Swasey, J.E. (2004). Effects of Compost Amended Container Media on Ornamental Plant Growth. HortScience, 39(4), 750C. Conference abstract, ASHS Annual Conference. DOI: 10.21273/HORTSCI.39.4.750C Original publication and study record