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While you can take cuttings from older, woody parts, the young plants always grow better. "Cut the plant back by two-thirds in the spring and wait for the new flush of growth before taking a cut ...
Recently, there are varieties that can be propagated from seeds. Sown in a sandy substrate, it easily germinates at a temperature of 16–18 °C. Zonal geraniums grow in U.S. Department of Agriculture hardiness zones 9 through 12. Zonal geraniums are basically tropical perennials and they overwinter in zones as cool as zone 7. [4]
Geraniums will grow in any soil as long as it is not waterlogged. [2] Propagation is by semiripe cuttings in summer, by seed, or by division in autumn or spring. [3] Geraniums are eaten by the larvae of some Lepidoptera species including brown-tail, ghost moth, and mouse moth. At least several species of Geranium are gynodioecious.
Image Credit: 123RF. Not all seeds sprout at the same rate. While environmental conditions may alter germination time (e.g., if the soil is too cold, tomato seeds may take longer to germinate ...
The hard-coated seeds germinate within 14 days at about 20 °C. once the seed coat is compromised. [ citation needed ] Micropropagation has been used commercially since the 20th century. In temperate climate zones, plants are set out in gardens in the spring, then can be dug prior to the first freeze and brought indoors to overwinter; they can ...
The seeds remain dormant while buried in the forest floor, sometimes for centuries, until a fire removes the organic litter and exposes the seeds to sunlight. The geraniums will germinate, bloom, and set seed profusely for several years after the fire, until other plants grow large enough to shade them out.
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