Grass
Sea Oats
Uniola paniculata
Monrovia® · Proven Winners® varieties
Traits
Varieties We Carry
Victoria BlueUniola paniculataFashion CherryUniola paniculataMystyUniola paniculata
Sizes & Pricing
1 galProven WinnersFrom$6.95
3 galFrom$19.95
Fresh this week. Last restocked Jun 15.
LightFull Sun
WaterLow
Mature size4-8 feet × 2-3 feet
About Sea Oats
Sea oats (Uniola paniculata) is a native coastal grass of the southeastern US, forming upright clumps 4–8 ft tall with large, drooping seed heads. A protected species in Florida, it plays a critical role in stabilizing coastal dunes through its deep root system (up to 40 ft) and rhizomatous spread. Well adapted to NE Florida's zone 9b coastal conditions, it tolerates salt spray, drought, and brief saltwater flooding. Starting at $6.95.
Plant details
- Bloom Season
- Summer, Fall
- Flower Color
- Non-flowering
- Growth Rate
- Moderate
- Foliage
- Semi-evergreen
- Soil
- Sandy, Alkaline, Well-drained
Best planting months
Recommended forZone 9b · St. Augustine, FL
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This monthGood windowOther months
Seasonal care
Good planting window.
Bloom season. Handles summer heat well once established.
Bloom season. Ideal planting window.
Retains foliage through winter.
Care essentials
Light
Sea oats require full sun and are found growing directly on open coastal dunes in NE Florida. They will not thrive in shade; site in the most exposed, sunny position available.
Water
Extremely drought tolerant once established; sea oats survive on natural rainfall in NE Florida's coastal conditions. Supplemental irrigation is needed only for establishment. Deep root systems reaching up to 40 feet allow the plant to access moisture unavailable to shallower-rooted plants.
Soil & Fertilizer
Thrives in pure, infertile, well-drained coastal sandy soils. Do not fertilize or amend the soil; sea oats are adapted to nutrient-poor beach sand and rich soils can promote disease. This is a protected species in Florida — confirm legal sourcing before purchase or planting.
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Common questions
Is Sea Oats a good plant for St. Augustine?
Sea Oats is a grass for Zone 9b coastal Florida gardens, reaching 4-8 feet × 2-3 feet.
Care information verified from
Last reviewed February 2026. Our care guidance comes from trusted horticulture sources and decades of helping St. Augustine gardeners. Conditions here can vary dramatically from one area to the next, so come ask us and we'll tailor it to your yard.