Unwins Pictorial Packet - Agastache Lavender Blue - 50 Seeds
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This guide is for gardeners seeking to add vibrant, long-lasting color to their perennial displays and attract beneficial pollinators. The Unwins Agastache Lavender Blue seeds offer a beautiful, low-maintenance perennial known for its striking blue flower spikes. A potential caveat is its preference for well-drained soil, which may require amendment in some garden conditions. This packet contains approximately 50 seeds, ideal for establishing a patch of this garden favorite.
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| Model Part Number | Pictorial Packet - Agastache Lavender Blue - 50 Seeds |
|---|---|
| Brand | Unwins |
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FAQs
How long does it take for Agastache seeds to germinate?
Agastache seeds typically take 14-21 days to germinate under optimal conditions (consistent moisture, warmth, and light).
When is the best time to plant Agastache outdoors?
Plant outdoors after the last frost has passed and the soil has warmed sufficiently. For earlier blooms, start seeds indoors 6-8 weeks prior.
Does Agastache need deadheading?
Yes, deadheading spent flower spikes encourages the plant to produce more blooms and can extend the flowering season into autumn.
Can Agastache be grown in containers?
Yes, Agastache can be grown in containers, provided the pot is large enough and has excellent drainage. Use a gritty potting mix.
Is Agastache a perennial or an annual?
Agastache is a perennial, meaning it will come back year after year, provided it survives the winter conditions in its growing zone.
What kind of soil does Agastache prefer?
It thrives in light, sandy, or gravelly soils that offer excellent drainage. It does not tolerate waterlogged conditions well.
How tall does Agastache Lavender Blue grow?
Mature plants typically reach a height of 60-90 cm (2-3 feet).
Troubleshooting
Seeds not germinating
Ensure seeds are fresh, sown at the correct depth, and kept consistently moist in a warm environment. Try stratification if germination is still poor. Soil may be too wet or too dry.
Seedlings are leggy and weak
Provide more light. Ensure seedlings are not overcrowded and have adequate air circulation. Avoid overwatering.
Plant wilting despite watering
The plant may be suffering from root rot due to poor drainage. Ensure the soil is well-drained and reduce watering frequency.
Few or no flowers
Ensure the plant is receiving at least 6 hours of direct sunlight daily. Avoid excessive fertilization, especially with high nitrogen content.
Powdery mildew on leaves
Improve air circulation by spacing plants adequately. Water at the base of the plant, avoiding overhead watering. Remove affected leaves and consider a fungicide if severe.
Pros and Cons
Pros
- Provides continuous blooms from mid-summer to autumn.
- Attracts beneficial pollinators to the garden.
- Durable perennial that returns year after year.
- Low maintenance requirements once established.
- Aromatic foliage adds an extra sensory dimension.
Cons
- Requires well-drained soil to prevent root rot.
- May need protection in extremely cold winters in some climates.
- Seeds can have variable germination rates.
- Prefers full sun for best flowering.
- Can take a season to establish a strong perennial presence.
Setup, Compatibility & Care
Sowing Seeds:
- Timing: Sow seeds indoors 6-8 weeks before the last expected frost, or directly outdoors after all danger of frost has passed and the soil has warmed.
- Medium: Use a sterile seed-starting mix or well-draining garden soil.
- Depth: Sow seeds thinly on the surface and lightly cover with soil (about 0.5 cm or 1/4 inch).
- Moisture: Keep the soil consistently moist but not waterlogged.
- Temperature: Optimal germination temperature is 18-24°C (65-75°F).
- Light: Provide bright light once seedlings emerge.
Transplanting:
- Once seedlings have developed a few sets of true leaves and the danger of frost has passed, transplant them outdoors.
- Harden off seedlings gradually by exposing them to outdoor conditions for a week before planting.
- Choose a location with full sun (at least 6 hours of direct sunlight per day) and well-drained soil.
- Space plants 30-45 cm (12-18 inches) apart.
Care:
- Watering: Water regularly until established. Once mature, Agastache is quite drought-tolerant, requiring watering only during prolonged dry periods.
- Soil: Prefers light, sandy, or gravelly soil. Amend heavy clay soils with compost or grit to improve drainage.
- Fertilizing: Generally, this plant does not require heavy feeding. Over-fertilizing can lead to leggy growth and fewer flowers. A light application of a balanced fertilizer in spring is usually sufficient.
- Pruning: Deadhead spent flower spikes to encourage reblooming and maintain a tidy appearance. Cut back plants in late autumn or early spring to encourage new growth.
- Pest & Disease: Generally pest and disease resistant, but watch for aphids or powdery mildew in humid conditions. Ensure good air circulation.