Allium cepa
We bring this in seasonally, so what is on the lot changes week to week.
Call (904) 471-0440 to confirm this plant and size before you make the trip.
Onion (Allium cepa) is a bulbous biennial herb native to Central Asia and one of the oldest and most widely cultivated vegetables in the world, grown for its pungent layered bulbs, green scallion shoots, and edible flowers. Hundreds of cultivars span a range from mild sweet types to sharp pungent storage onions. For sale in St. Augustine, FL from $1.15.
Bloom season. New foliage emerges. Good planting window.
Active growing season.
Foliage may begin to change or drop. Ideal planting window.
Dormant — drops foliage.
Onions need full sun — at least 6 hours of direct sunlight daily. In NE Florida, plant in an open, sunny bed from September through December for bulb development during the short-day winter season.
Keep soil consistently moist but not waterlogged; onions have shallow roots that dry out quickly in NE Florida's sandy soils. Water about 1 inch per week and use mulch to conserve moisture and suppress weeds.
Grow in well-drained soil rich in organic matter with a pH of 6.0–7.0. Amend sandy beds with compost before planting. Side-dress with a nitrogen-rich fertilizer 3–4 weeks after planting to support bulb development.
Shares 5 of the same needs: full sun, moderate water, sandy, zone 9a hardiness, and pollinator-friendly.
Shares 5 of the same needs: full sun, moderate water, sandy, zone 9a hardiness, and pollinator-friendly.
Shares 5 of the same needs: full sun, moderate water, sandy, zone 9a hardiness, and pollinator-friendly.
Shares 5 of the same needs: full sun, moderate water, sandy, zone 9a hardiness, and pollinator-friendly.
Shares 5 of the same needs: full sun, moderate water, sandy, zone 9a hardiness, and pollinator-friendly.
Shares 5 of the same needs: full sun, moderate water, sandy, zone 9a hardiness, and pollinator-friendly.
Onion is a herb for Zone 9b coastal Florida gardens, reaching 1-2 feet × 0.5-1 feet.
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.
