Choosing the Right Lavender Varieties for Container Gardening
When growing lavender in containers, selecting the appropriate variety is crucial for success. Not all lavenders thrive equally well in pots, so consider compact and dwarf varieties that adapt better to confined root spaces.
- English Lavender (Lavandula angustifolia): A popular choice, known for its fragrance and cold hardiness. Varieties like ‘Hidcote’ and ‘Munstead’ remain compact and bloom profusely.
- French Lavender (Lavandula dentata): Features serrated leaves and a slightly larger growth habit. It is less cold-hardy but suitable for warmer climates.
- Spanish Lavender (Lavandula stoechas): Recognizable by its unique flower heads, it grows well in containers with adequate sunlight.
- Lavandin (Lavandula x intermedia): A hybrid with vigorous growth; choose dwarf cultivars like ‘Provence’ to prevent overcrowding in pots.
Opt for varieties that reach no more than 2 feet in height for easier management in containers.
Selecting Appropriate Containers and Soil
Container Selection
Lavender requires excellent drainage to prevent root rot. Choose containers with:
- Drainage holes: Critical for excess water escape.
- Material: Unglazed terracotta or porous ceramic pots allow better airflow and moisture regulation compared to plastic pots.
- Size: At least 12-16 inches in diameter to accommodate root growth and avoid frequent repotting.
Soil Composition
Lavender prefers well-draining, slightly alkaline soil. Use a mix tailored for Mediterranean herbs:
- 60% high-quality potting soil (preferably sandy or loamy)
- 30% coarse sand or perlite to improve drainage
- 10% organic compost for nutrients
Avoid heavy, moisture-retentive soils that can cause root rot. Test soil pH aiming for 6.7 to 7.3.
Optimal Sunlight and Watering Practices
Sunlight Requirements
Lavender thrives in full sun, needing at least 6 to 8 hours of direct sunlight daily. Place containers in south or west-facing areas to maximize exposure.
Watering Frequency
Overwatering is a common mistake that harms lavender. Follow these guidelines:
- Water deeply but infrequently, allowing the top 1-2 inches of soil to dry out between watering.
- In summer, watering once or twice weekly is usually sufficient depending on temperature and humidity.
- Reduce watering in cooler months but don’t let the soil become bone dry.
- Water early in the day to allow foliage to dry and reduce fungal risks.
Fertilizing and Pruning Techniques
Fertilizing Lavender in Containers
Lavender does not require heavy feeding. Use a balanced, slow-release fertilizer in spring as new growth begins:
- Apply a fertilizer with a ratio like 10-10-10 or 12-12-12 at the manufacturer’s recommended rate.
- Alternatively, supplement with light applications of liquid fertilizer every 4-6 weeks during growing season.
- Avoid excessive nitrogen which promotes leaf growth at the expense of blooms.
Pruning Practices
Regular pruning keeps lavender healthy, bushy, and productive:
- Prune lightly after the first bloom to encourage a second flush of flowers.
- In late summer or early fall, trim back about one-third of the plant’s height, avoiding cutting into old wood.
- Remove dead or woody stems to improve airflow and light penetration.
- Use clean, sharp shears to make clean cuts and reduce infection risk.
FAQs
Can I grow lavender indoors in containers?
Yes, but it requires a very sunny window or supplemental grow lights providing 6-8 hours of direct light. Good air circulation and well-drained soil are essential.
How often should I repot my lavender plant?
Repot every 2-3 years or when the plant becomes root-bound. Use fresh soil and slightly larger containers to encourage healthy growth.
What are signs of overwatering lavender in containers?
Yellowing leaves, wilting despite moist soil, and root rot odors indicate overwatering. Adjust watering schedule and ensure proper drainage.
Can I propagate lavender from cuttings in containers?
Yes, semi-hardwood cuttings taken in late summer root well in a sandy potting mix. Keep them moist and shaded until roots develop.
Takeaways
- Choose compact lavender varieties suited for container growth like English lavender ‘Munstead’ or ‘Hidcote’.
- Use porous containers with ample drainage and a well-draining, slightly alkaline soil mix.
- Provide full sun exposure for at least 6-8 hours daily.
- Water deeply but infrequently; avoid soggy soil to prevent root rot.
- Fertilize lightly with balanced fertilizer in spring and prune regularly to maintain shape and encourage blooms.
References
- Royal Horticultural Society: Growing Lavender
- Gardening Know How: Growing Lavender in Containers
- The Old Farmer’s Almanac: Lavender
