From the report “Humic Acid Seed and Substrate Treatments Promote Seedling Root Development“, of Jack A. Hartwigsen and Michael R. Evans, published at Hortscience Seed of Pelargonium ×hortorum L.H. Bailey ‘Freckles’ (geranium) and Tagetes patula L. ‘Bonanza’ (marigold) were soaked for 12, 24, or 48 h in solutions containing: + 0 (deionized water), + 5000,…