Verbascum Planting Guide
Quick Facts About Verbascum
Verbascum are tough, drought tolerant plants. Deer tend to avoid them, but the butterflies absolutely love them. Often referred to as Mullein, these flowers come in a large variety of colors and give an eye-catching display of "fuzzy" green foliage.
Planting Time
Plant indoors 6 - 8 weeks before the last frost. Or, start directly outdoors after danger of frost has passed.
Planting Location
Plant in full sun with dry, well-drained soil.
How to Plant Verbascum
- You have two options for planting seeds: Sow them directly into the garden, after the risk of frost has passed, by pressing the seed into the soil but not covering. Alternatively, start seeds indoors six to eight weeks before the average last frost date in spring.
- Presoak seeds overnight before planting 4 - 5 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 20 - 36 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.
- For the first year of establishment, water the young plants occasionally. After that they are quite drought tolerant, though they will grow larger with an occassional watering.
- The flowers can be left on to self-seed. Or can be deadheaded to encourage more blooming. Cut off old flowering stems to ground level to prolong flowering.
Verbascum Options
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