How to Grow Sea Oxeye

iNaturalist

Sea Oxeye

Borrichia frutescens

shrub

Sea oxeye is a salt-tolerant, evergreen shrub native to coastal areas of the southeastern United States. It produces bright yellow daisy-like flowers and silvery-green foliage adapted to harsh maritime conditions. This drought-tolerant plant is excellent for coastal landscapes, salt marshes, and xeriscaping.

When should you plant Sea Oxeye in your zone?

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Example Sea Oxeye timeline · Pittsburgh, PA (Zone 6b)

Plant Sea Oxeye
Around Apr 17

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

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

Before the first fall frost (≈ Nov 8)

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

Growing Conditions

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Sun: Full sun, 6-8 hours daily; tolerates partial shade

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Water: Low water needs once established; drought-tolerant. Water regularly during establishment (first 6-12 months), then minimal supplemental watering needed. Tolerates salt spray and wet conditions.

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Spacing: 24-36 inches

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Days to maturity: Not applicable; perennial woody shrub

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Planting depth: Plant at same depth as root ball; can be direct seeded 1/4 inch deep

Soil

Type: Sandy, well-draining soil; tolerates poor, infertile soils

pH: 6.0-7.5

Amendments:

Sand for drainage Minimal organic matter needed

Growing Zones

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Thrives in zones 8-11, with best performance in zones 9-10

8a 8b 9a 9b 10a 10b 11a 11b

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Growth Stages

Seedling

4-6 weeks

Small emerging plants with fine, thread-like cotyledons developing into narrow, silvery-green foliage

Protect from wind and excessive moisture; provide consistent but not wet conditions; keep in bright light

Vegetative Growth

6-12 months

Plant develops woody stems and dense, finely-textured silvery-green foliage; slow to moderate growth rate

Water during dry spells; prune lightly to encourage branching; minimal fertilizer needed

Flowering

Late spring through fall (6-8 months in warm climates)

Bright yellow daisy-like flowers (3/4-1 inch diameter) appear at branch tips; flowers bloom in terminal clusters

Deadhead spent flowers to encourage continuous blooming; provide full sun for best flowering; minimal pruning

Fruiting & Seeding

2-3 months after flowering

Flowers develop into small seed heads; plant self-seeds readily in suitable locations

Allow some flowers to remain for seed production if desired; collect seeds from mature dry heads

Dormancy

Winter months (or year-round growth in zones 10-11)

In cooler zones, plant may slow growth or lose some foliage in winter; remains largely evergreen in warm climates

Minimal care needed; protect from hard freezes in zone 8; remove any dead wood in spring

Companion Planting

Plan your garden →

Plant with:

Marsh myrtle Saltbush Sea lavender Bayberry Wax myrtle Beach plum Inkberry Goldenrod

Avoid planting near:

Plants requiring frequent watering or rich soil amendments Tender tropical plants in zone 8

Common Pests

Spray with water to dislodge; use neem oil or insecticidal soap if severe; ensure adequate humidity
Use yellow sticky traps; spray with insecticidal soap; encourage natural predators
Prune affected branches; spray with horticultural oil in dormant season; use neem oil during growing season

Uses

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Traditional herbal tea

Culinary

Historically used by coastal indigenous peoples to make medicinal teas from leaves and flowers. Some traditional preparations may have mild digestive or anti-inflammatory properties. [source]

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Coastal landscaping & erosion control

Household

Excellent for salt marshes, coastal dunes, and stabilizing banks due to deep root systems and salt tolerance. Provides natural windbreak and wildlife habitat. [source]

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Pollinator and wildlife support

Wildlife

Bright yellow flowers attract bees, butterflies, and other pollinators. Seeds provide food for birds and other wildlife. [source]

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Fresh & dried flower arrangements

Craft

Cheerful yellow blooms are suitable for cutting gardens and dried flower crafts. Maintains color well when dried and used in arrangements. [source]

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Traditional coastal remedies

Medicinal

Used in traditional maritime folk medicine for minor skin irritations and digestive support, though scientific research is limited. Consult herbalists or healthcare providers before use. [source]

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

Harvest Tips

Sea oxeye is ornamental rather than harvested. Cut flowers can be collected for fresh arrangements by cutting stems in morning when flowers are fully open. Seeds can be collected by gathering mature, dry seed heads in late summer/fall and allowing them to dry completely before storing.

Fun Facts

🌱 Sea oxeye is extremely salt-tolerant and can thrive in salt marshes with periodic saltwater inundation, making it one of the hardiest native shrubs for coastal environments.
🌱 The plant's silvery-green foliage is an adaptation to harsh coastal conditions, with fine leaf structure helping reduce water loss in windy, salty environments.
🌱 Sea oxeye is a keystone plant in southeastern U.S. coastal ecosystems, providing food and habitat for numerous bird and pollinator species throughout the year.

Gardening Terms

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

Deadhead Full Sun Partial Shade

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