Ageratum Red Sea - 20 Seeds
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This guide is for gardeners looking to add vibrant, long-lasting color to sunny borders and arrangements. Ageratum 'Red Sea' offers a key benefit of tall stems with deep purple-red, fluffy flowers that attract pollinators and are excellent for cutting. A potential caveat is that it is a half-hardy annual, requiring careful transplanting after the risk of frost has passed. This product provides 20 seeds for growing Ageratum houstonianum, known for its striking flowers from mid-summer to early autumn.
All features
| Model Part Number | 20 |
|---|---|
| Brand | Marshalls Garden |
Extended Product Information
FAQs
What is the best time to sow Ageratum Red Sea seeds?
Sow seeds indoors about 6-8 weeks before the last expected frost date in your region.
How tall do Ageratum Red Sea plants grow?
The plants typically grow to a height of about 500 mm (approximately 20 inches).
Can I grow these in containers?
Yes, Ageratum Red Sea is well-suited for growing in pots and containers on patios or balconies.
How long do the flowers last when cut?
Ageratum Red Sea flowers generally have a good vase life, often lasting for 7-10 days when properly conditioned.
When do they start blooming?
Blooming typically begins in mid-summer and continues into early autumn.
Are these plants annuals or perennials?
Ageratum Red Sea is a half-hardy annual, meaning it completes its life cycle in one growing season and needs to be replanted from seed each year.
What type of soil do they prefer?
They prefer well-draining soil. Avoid waterlogged conditions.
Troubleshooting
Seeds not germinating
Ensure consistent moisture, appropriate temperature (15-20°C), and light covering of compost. Avoid overwatering.
Seedlings are weak or leggy
Provide adequate light (a sunny windowsill or grow lights) and ensure the temperature is not too high. Check for proper spacing as they grow.
Plants not flowering
Ensure the plants are receiving adequate sunlight and nutrients. Regular deadheading of spent blooms can encourage further flowering.
Pests on plants (e.g., aphids)
Inspect plants regularly. Use insecticidal soap or neem oil for treatment, or encourage natural predators if possible.
Pros and Cons
Pros
- Unique and eye-catching deep purple-red flower color.
- Long vase life makes it ideal for cut flower arrangements.
- Attracts beneficial pollinators to the garden.
- Provides color from mid-summer into early autumn.
- Suitable for sunny borders and container planting.
Cons
- Requires starting indoors and careful transplanting due to being a half-hardy annual.
- Needs protection from frost, limiting planting time in cooler climates.
- May require deadheading to encourage continuous blooming.
Setup, Compatibility & Care
Sowing Indoors:
- Sow seeds indoors in moist seed compost.
- Cover seeds lightly with compost.
- Maintain a temperature of 15–20°C (59–68°F).
Transplanting Seedlings:
- Once seedlings are large enough, transplant them into individual pots or trays, spacing them about 5 cm apart.
- Harden Off: Gradually acclimatize the seedlings to outdoor conditions over 2–3 weeks before planting them out.
- Plant out seedlings in their final position after all danger of frost has passed. Ensure spacing of approximately 25 cm (10 inches) between plants.
Care:
- Sunlight: Prefers a sunny location.
- Watering: Water regularly, especially during dry periods.
- Deadheading: Remove faded flowers regularly to encourage more blooms and prolong the flowering season.
- Soil: Well-draining soil is recommended.
Compatibility:
- Borders: Excellent for filling sunny garden borders.
- Containers: Can be grown in pots and containers.
- Cut Flowers: Ideal for floral arrangements.