How to Grow Mimosa

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Mimosa

Albizia julibrissin

tree

Mimosa is a fast-growing, deciduous tree native to Asia, prized for its feathery, fern-like foliage and delicate, fragrant pink and white pom-pom flowers. It typically reaches 20-40 feet tall and wide, creating an airy, tropical appearance even in temperate climates. The tree's leaves fold closed at night, earning it the nickname 'silk tree.'

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Example Mimosa timeline · Pittsburgh, PA (Zone 6b)

Plant Mimosa
Around Apr 17

Near Pittsburgh's average last spring frost.
Tend & protect
Late spring–summer

Watering, feeding, and pest-watch reminders.
Harvest Mimosa
Late summer into fall

Before the first fall frost (≈ Nov 8)

Sample dates for Pittsburgh, PA. Sign up to get exact Mimosa dates for your own zip code.

Growing Conditions

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Sun: Full sun, 6+ hours daily for best flowering

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Water: Moderate water needs; drought-tolerant once established. Water regularly during first growing season and in prolonged dry spells. Reduce watering in winter.

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Spacing: 240 inches

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Days to maturity: 3-5 years to reach flowering maturity

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Planting depth: Plant transplants at same depth as root ball; soak seeds in warm water overnight before planting 1/4 inch deep

Soil

Type: Well-draining loamy to sandy soil

pH: 6.0-7.5

Amendments:

Organic compost at planting Mulch to retain moisture

Growing Zones

Find your zone →

Thrives in zones 6b-9a; marginal in zone 6a and zone 10a

6a 6b 7a 7b 8a 8b 9a 9b 10a

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Growth Stages

Seedling

8-12 weeks

Small tree with initial simple leaves; develops fern-like compound foliage within weeks

Keep soil consistently moist but not waterlogged. Provide bright light. Protect from frost in first winter. May grow 3-4 feet in first year.

Juvenile

1-3 years

Developing tree with full feathery foliage and branching structure; no flowers yet

Establish strong central leader by selective pruning. Water during dry periods. Stake in windy locations for first 2-3 years.

Flowering

4-8 weeks

Tree produces abundant pink and white fluffy flowers at branch tips, typically in late spring to early summer

Ensure adequate sunlight for maximum blooms. Avoid heavy pruning during flowering. Flowers are fragrant and attract pollinators.

Fruiting

3-4 months

Flat, brown bean-like seed pods develop after flowering and persist on branches through winter

Pods are ornamental and harmless. Remove if self-seeding is a concern. May shed pods in fall and winter.

Dormancy

3-4 months

Tree loses its deciduous foliage in late fall and remains bare through winter, revealing attractive branching structure

Minimal water needed during dormancy. Prune in late winter before new growth. No fertilizer needed.

Companion Planting

Plan your garden →

Plant with:

Shade-tolerant understory plants Ornamental grasses Shade perennials Hostas Ferns

Avoid planting near:

Vegetable gardens and crop fields Turf grass areas (can self-seed aggressively) Native plant restoration areas

Common Pests

Monitor for webbed leaf clusters; prune affected branches. Spray with insecticidal soap or neem oil if severe. Encourage natural predators.
Spray foliage with water to dislodge. Apply miticide or neem oil for heavy infestations. Increase humidity around tree.
and
Bacillus thuringiensis (Bt) is effective for caterpillar control. Prune out webbed areas.
Handpick in early morning or use Japanese beetle traps at distance from tree. Spray neem oil if needed.

Uses

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Pollinator Support

Wildlife

Mimosa flowers attract bees, butterflies, and hummingbirds, providing valuable nectar and pollen in late spring. The fragrant blooms make it a beneficial addition to pollinator gardens. [source]

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Ornamental Shade Tree

Household

The feathery foliage and delicate pink flowers create a striking tropical appearance in temperate landscapes. Its light, filtered shade makes it ideal for under-planting with shade-tolerant plants. [source]

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Traditional herbal use

Medicinal

In traditional Chinese and Ayurvedic medicine, mimosa bark (Albizia bark) is used to support relaxation and emotional balance. The flowers have been used in herbal preparations. [source]

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Cut flowers and floral arrangements

Craft

The fragrant, unique pom-pom flowers are prized for fresh and dried floral arrangements. Cut stems last several days in water and add exotic texture to bouquets. [source]

This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.

Harvest Tips

Mimosa is an ornamental tree; no traditional harvest. Enjoy flowers in late spring to early summer for their fragrance and beauty. Allow seed pods to remain for winter interest, or remove if unwanted self-seeding is a concern.

Fun Facts

🌱 Mimosa leaves exhibit nyctinasty—they fold closed at night and reopen each morning, a behavior triggered by circadian rhythms and light changes.
🌱 In some regions, mimosa is considered an invasive species because it self-seeds prolifically and can outcompete native plants. It is listed as invasive in parts of Europe and Australia.
🌱 The tree is incredibly fast-growing; saplings can grow 3-4 feet per year, reaching flowering maturity in just 3-5 years.

Gardening Terms

New to gardening? Learn about terms used in this guide:

Full Sun

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