Best plants for Delaware
These species reliably perform in Delaware's climate — a blend of regionally-adapted ornamentals and native plants that don't need babying once established. Start with this short list, then expand once you know your specific microclimate (slope, shade, drainage).
Native plants of Delaware
Natives evolved alongside Delaware's soils, pollinators, and weather patterns, so they need almost no supplemental water or fertilizer once established. Mixing 30-50% natives into a garden dramatically improves its drought resilience and its value to local birds and pollinators.
- American holly (Ilex opaca)
- Sweetbay magnolia
- Inkberry
- Atlantic white cedar
- Cardinal flower
For zone-specific timing and a fuller plant palette, see the gardening guide for USDA zone 7.
Your plant advisor can filter the full database to species suited to your Delaware zone.
Frost dates and timing in Delaware
Average last spring frost: early to mid-April. Average first fall frost: late October to early November. Growing season runs about 190-210 days. As always, average dates are starting points — set seedlings out a week or two later than the average last-frost for high-value crops like tomatoes and peppers, and have row cover or frost blankets ready for an unseasonable late freeze.
Use the fall planting schedule by zone to plan your second crop, and the vegetable garden planting schedule for week-by-week spring timing.
Soils and amendment in Delaware
Sandy coastal-plain loams across most of the state; piedmont clays in the far north.
Challenges specific to Delaware
Sandy soils that drain too fast and leach nutrients, deer pressure, and salt spray for ocean-adjacent gardens.
For drought-prone parts of Delaware, see the drought-tolerant garden design guide. If your yard sits low and stays wet, the drainage fix without regrading guide covers raised beds, French drains, and bog-tolerant planting palettes.
Design your Delaware garden in 3D
Sketch your beds, place plants to scale, and see the whole design in 3D before you buy a single one-gallon pot. The free designer filters plants by USDA zone, so anything you place is already suited to the climate in Delaware.
Design your Delaware garden in 3D
Free, no signup required. Filter plants by USDA zone 7a-7b and see your design rendered to scale before you buy.
Open the free 3D garden designerFrequently asked about gardening in Delaware
›What USDA hardiness zones is Delaware in?
Delaware spans USDA zones 7a-7b. Delaware is almost entirely zone 7 — Wilmington at the northern tip in 7a, the southern beach towns of Lewes and Rehoboth in 7b. Match plant cold-hardiness ratings to your local zone — pushing into warmer-rated species is a gamble against the next hard winter.
›When is the last spring frost in Delaware?
Average last spring frost in Delaware is around early to mid-April, and the first fall frost typically arrives late October to early November. That gives a typical growing season of 190-210 days. Average dates are starting points — set seedlings out a week or two later than the average for safety.
›What plants grow well in Delaware?
Reliable choices for Delaware include Crepe myrtle, Hydrangea, Sweet corn, Watermelon. These species are matched to Delaware's climate and soils — a blend of regionally-adapted ornamentals and natives that perform without babying once established.
›What plants are native to Delaware?
Native plants in Delaware include American holly, Sweetbay magnolia, Inkberry. Natives evolved alongside local soils, pollinators, and weather, so they typically need no supplemental water or fertilizer once established — and they support local birds and pollinators in ways non-native ornamentals can't.
›What's distinctive about gardening in Delaware?
Delaware's flat coastal plain and long warm season make it one of the easiest Mid-Atlantic states for vegetable gardening — Sussex County leads the nation in lima bean production. Sandy soils that drain too fast and leach nutrients, deer pressure, and salt spray for ocean-adjacent gardens.