Plectranthus Planting Guide
Quick Facts About Plectranthus
Plectranthus is a great ground cover, container plant, and interesting house plant. Easily grown from seeds, it tolerates heat, stress, and drought. It also provides a silvery display of color all summer long.
Planting Time
Plant indoors 4 - 6 weeks before the last frost. Or, start directly outdoors after danger of frost has passed.
Planting Location
Plant in full sun to partial shade with well-drained, loamy soil.
How to Plant Plectranthus
- You have two options for planting seeds: Sow them directly into the garden, after the risk of frost has passed, by not covering the seeds. Alternatively, start seeds indoors four to six weeks before the average last frost date in spring.
- Germinate seeds in a damp paper towel prior to planting. Plant 1 - 2 seeds per cell or plant.
- Once seedlings sprout, ensure they receive plenty of light by placing them on a sunny windowsill or positioning them 3-4 inches below fluorescent plant lights that are switched on for 16 hours daily and off for 8 hours at night. Adjust the lights as the plants grow taller. Avoid using incandescent bulbs as they generate excessive heat. Remember, most plants need a period of darkness to thrive, so do not keep the lights on for 24 hours.
- Transplant into garden when temperatures are consistently warm.
- Before transplanting seedlings into the garden, it's essential to "harden them off". This involves acclimating young plants to outdoor conditions by placing them in a sheltered outdoor area for about a week. Initially, shield them from strong winds and direct sunlight. If there's a risk of frost overnight, either cover the plants or bring them indoors, then return them outside in the morning. This hardening off method helps strengthen the plant's cell structure, minimizing transplant shock and sun damage.
- Space plants 24 - 32 inches apart in garden.
Care And Maintenance
- Keep weeds under control during the growing season. Weeds compete with plants for water, space and nutrients, so control them by either cultivating often or use a mulch to prevent their seeds from germinating.
- Mulches play a vital role in preserving soil moisture and ensuring consistent soil temperatures. When it comes to annuals, using organic mulch made from shredded leaves not only enhances the appearance of the bed but also enriches the soil as it decomposes over time. Remember to keep mulch away from the plant stems to avoid potential rot issues.
- Do not overwater, as this will harm plants if their soil is not well drained. Note that if you choose to grow your Plectranthus in an outdoor container or basket, they may need more frequent watering then in the garden or yard.
- Occassionally prune some leaves from the base of the young plants, as this will help to keep them tidy. This will produce a bushy plant and good branching early on in the plants life. Pinch off old blooms as well, as this will encourage reblooming.
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