Grow privet senna in full sun on well-drained sand, and water only until it roots. Privet senna is Senna ligustrina.
Give it full sun and well-drained sand, and water only until it roots
| Factor | Recommended | Avoid |
|---|---|---|
| Sun | Full sun; light shade is all right | Do not hide it in deep shade |
| Soil | Well-drained sand, even if it is poor | Do not plant it in a stagnant bog |
| Water | Water a new shrub; then let the sand dry | Do not keep the roots on a wet lawn drip |
| Salt | Keep it off salt-water flooding | Do not plant it where salt water stands |
privet senna wants sun and sand that drains. Water a new plant through the first season. Once the roots take, it does not need regular watering. [1] It flowers in the cool, short-day months, from autumn into spring. [2] It can reach full height in one warm season, so leave room. [3] American senna is the hardy meadow clump — see How to Grow Wild Senna. Pick the kind on Types of Senna.
- Set a nursery plant in well-drained sand, with the crown even with the surrounding soil.
- Leave room. The shrub can reach four to eight feet in one growing season.
- Water to settle the sand, then water only when the sand is dry. After the first season, skip regular watering.
Does privet senna need regular water?
Water a new shrub until it roots. After that, let the sand dry. Do not keep the roots wet.
When does privet senna bloom?
It flowers in the cool, short-day months, from autumn into spring. It is not a midsummer meadow bloom.
Clip the pods if you do not want a thicket of seedlings
Privet senna reseeds freely. Clip the brown pods if you do not want a thicket of seedlings. The shrub also looks messy when every pod hangs on.
- Clip ripe brown pods before they split if you do not want seedlings.
- Leave a few pods if you want more plants next year.
- Do not shear the shrub in the middle of its cool- season bloom.
Should I clip privet senna pods?
Yes, if you do not want a thicket of seedlings. Clip the brown pods before they split.
Not a hardy meadow senna — and not the tea shrub
American senna and Maryland senna die to the ground in a cold winter. Privet senna is an evergreen Florida shrub and will not take that freeze. Senna tea comes from a different shrub, Senna alexandrina. Do not brew the garden plant. [4]
Is privet senna a hardy meadow plant?
No. Privet senna is an evergreen sand shrub. American senna and Maryland senna are the hardy meadow kinds.
If the shrub is still filling out in year one, leave it — it often reaches full height in a single warm season.
FAQ
Can I grow privet senna from seed?
Yes. It grows easily from seed. Nick the coat if the seed is hard, then sow it in warm, draining mix. Site the shrub on sand, not in a cold-winter meadow.
Is privet senna salt-tolerant?
No. Keep it off salt-water flooding. Do not plant it where salt water stands.
Will privet senna take a hard freeze?
No. It is a frost-tender evergreen. American senna is the hardy meadow clump if you need a cold winter.
Why are the leaves chewed?
Sulphur-butterfly caterpillars eat the leaves. An established shrub usually grows through it. Do not spray a host plant you wanted for those caterpillars.
Related guides
Recommended plants
References
- [1] UF/IFAS Extension Hillsborough County -
https://blogs.ifas.ufl.edu/hillsboroughco/2024/01/14/senna-ligustrina-a-native-and-host-plant-for-sulphur-butterflies/ - [2] Florida Wildflower Foundation -
https://www.flawildflowers.org/wp-content/uploads/2024/07/senna_ligustrina.pdf - [3] Port St. Lucie Botanical Gardens -
https://www.pslbg.org/privet-senna/ - [4] Florida Native Plant Society -
https://www.fnps.org/plant/senna-ligustrina
This note is part of Senna Guides.
More first-season notes by plant are gathered in How to Grow Guides.
Updated: Reviewed by Bosquelle Editors