Saponaria Planting Guide
Quick Facts About Saponaria
Saponaria is a lovely annual flower that is easy to grow from seeds. Grows great in beds, borders, or gardens. It is also known as Soapwort. It liberally re-seeds itself and will return each season from its own seeds.
Planting Time
Plant indoors 4 - 6 weeks before the last frost. Or, start directly outdoors after danger of frost has passed, or in the fall.
Planting Location
Plant in full sun to partial shade with average, well-drained soil.
How to Plant Saponaria
- You have two options for planting seeds: Sow them directly into the garden at a depth of 1/8 inch after the risk of frost has passed. Alternatively, start seeds indoors four to six weeks before the average last frost date in spring.
- If planting indoors, Saponaria will germinate better after a cold treatment. To do this, dampen a paper towel, place the seeds on the towel and roll it up. Place the damp towel with the seeds into a ziploc bag and place it in the refrigerator for 4 weeks.
- Plant 2 - 3 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 18 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.
- Water regularly to help the plant to establish. Once established, it is fairly drought-tolerant so needs only be watered about once a week.
- Deadhead spent blooms to promote future blooming. And in the fall, cut plant back, if a tidier appearance is wanted.
Saponaria and Other Options
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Saponaria - Ocymoides
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