You actually grow moss rose (Portulaca grandiflora), a flower resembling moss, through seeds or cuttings, with full sun and well-drained soil being crucial for success. The moss rose is often referred to as a "moss flower" due to its moss-like foliage and vibrant, daisy-like flowers. Since true mosses don't produce flowers, we'll focus on growing moss roses!
Here's a breakdown of how to cultivate these colorful beauties:
Starting from Seed:
- When to Plant: You have two options:
- Direct Sowing: Sow seeds directly into the ground after the last frost when the soil has warmed up.
- Indoor Starting: Start seeds indoors 4-8 weeks before the average last frost to get a head start and earlier blooms.
- Soil Preparation:
- Moss roses thrive in well-drained soil. They are surprisingly tolerant of lean, sandy, gravelly, or even rocky soils. Amend heavy clay soil with sand or gravel to improve drainage.
- Sowing the Seeds:
- Direct Sowing: Sprinkle the tiny seeds lightly over the prepared soil surface. Gently press them into the soil; do not bury them deeply as they need light to germinate. Keep the soil consistently moist until germination occurs.
- Indoor Starting: Sow seeds in seed trays or small pots filled with a well-draining seed-starting mix. Gently press the seeds into the surface and keep them moist. Provide adequate light, either natural or grow lights.
- Germination: Seeds typically germinate in 1-2 weeks at a temperature of around 70-75°F (21-24°C).
- Transplanting (if started indoors): Once the seedlings have developed a few sets of true leaves and the danger of frost has passed, transplant them outdoors into their permanent locations. Space plants about 6-12 inches apart.
Growing Conditions:
- Sunlight: Moss roses need at least 6-8 hours of direct sunlight per day to flower profusely. Lack of sunlight will result in fewer blooms.
- Soil: Well-drained soil is essential. They tolerate a range of soil types, including sandy, gravelly, and poor soils. Avoid overly rich soil, as this can lead to excessive foliage growth at the expense of flowers.
- Watering: Water regularly, especially during dry periods, until plants are established. Once established, moss roses are drought-tolerant and prefer slightly dry conditions. Avoid overwatering, which can lead to root rot.
- Fertilizing: Moss roses generally don't require much fertilizer. If desired, apply a light feeding of balanced fertilizer diluted to half strength every few weeks during the growing season.
- Deadheading: Deadheading spent flowers is not usually necessary, as moss roses are self-cleaning.
Propagating from Cuttings:
- Moss roses can also be propagated from stem cuttings. Take 2-3 inch cuttings in late spring or early summer. Remove the lower leaves and insert the cuttings into a well-draining potting mix. Keep the soil moist until roots develop, which usually takes a few weeks.
Common Issues:
- Root Rot: Overwatering can lead to root rot. Ensure the soil is well-draining and avoid excessive watering.
- Slugs and Snails: These pests may occasionally feed on the foliage. Control them with appropriate organic or chemical methods.
By following these guidelines, you can successfully grow and enjoy the vibrant "moss flowers" of Portulaca grandiflora in your garden.
