Moderate Increases in Substrate Packing Density Can Improve Petunia Root Development

2025/07/31 by Jeb S. Fields, Kristopher S. Criscione · 1 voice · 1 citation
Agricultural and Biological Sciences · Biochemistry, Genetics and Molecular Biology · #Flowering Plant Growth and Cultivation #Plant nutrient uptake and metabolism #Plant tissue culture and regeneration

paper · doi:10.21273/horttech05660-25

openalex publication_date 2025/07/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/22

Abstract

Greenhouse horticulture relies on manual labor for plug transplanting, which is subject to variability in substrate packing density. Little research exists on the effect variable substrate packing density has root morphological development. Petunia hybrid ‘Supertunia Honey’ plugs were grown in peat-based substrates packed at four densities (0.08, 0.10, 0.12, and 0.14 g·cm −3 ). The results indicated that root development was improved with moderately increased substrate density.

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• Stratified Cutting Propagation Substrates Reduce Herbaceous Plug Structural Stability but Facilitate Similar Root Growth to a Control

Discussions

• Press your peat for improved root health! New research from the Fields Lab at UF has identified improved rooting with slightly compressed peat substrates. Container filling can vary in production, but [bsky, 2 points, 0 comments]

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