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City guide · Zone 7a

What to plant in St. Louis, Missouri

A full-sun bed in St. Louis: Dwarf panicle hydrangea 'Little Lime', Pink muhly grass, Lavandin 'Phenomenal', Garden peony 'Sarah Bernhardt', Two-row stonecrop 'Dragon's Blood'. Zone 7a, last frost around Apr 5.

Hot, humid summers and winter cold snaps. Tough, adaptable plants are the safe choice.

Preview: plant data is awaiting horticulturist review. A professional horticulturist hasn't reviewed our plant table yet. Lists still follow fixed rules for zone, sun, pets, deer and invasive status.

St. Louis, Missouri at a glance

Hardiness zone (2023 USDA)
7a (ZIP 63101)
Typical last spring frost
Apr 5
Typical first fall frost
Nov 1
Spring planting window
mid-April to mid-May
Fall planting window
late September to late October
Annual rainfall (approx.)
41 in

Frost dates are typical metro values, not forecasts. Humid summers and wide temperature swings matter alongside winter cold; most plants hardy here also take the heat. Our lists for St. Louis use the rules for the Midwest.

Zone: USDA Plant Hardiness Zone Map, 2023 (USDA Agricultural Research Service; data by the PRISM Climate Group, Oregon State University). ZIP code to state data: GeoNames (geonames.org), CC BY 4.0.

A full-sun bed in St. Louis

6 or more hours of direct summer sun, 12 × 6 ft.

12 × 6 ft · Zone 7a · 6+ hours of sun · Cottage

Kinds

5

Plants

13

Coverage

87%

Mulch

9 bags

Mulch: 0.67 cu yd at 3 in deep (9 bags of 2 cu ft). Plants cover about 87% of the 72 sq ft bed when mature.

A part-shade bed in St. Louis

2 to 4 hours of direct summer sun, 12 × 6 ft.

12 × 6 ft · Zone 7a · 2–4 hours of sun · Classic

Kinds

5

Plants

28

Coverage

87%

Mulch

9 bags

Mulch: 0.67 cu yd at 3 in deep (9 bags of 2 cu ft). Plants cover about 87% of the 72 sq ft bed when mature.

A shady bed in St. Louis

Under 2 hours of direct summer sun, 12 × 6 ft.

12 × 6 ft · Zone 7a · Under 2 hours of sun · Classic

Kinds

5

Plants

33

Coverage

79%

Mulch

9 bags

Mulch: 0.67 cu yd at 3 in deep (9 bags of 2 cu ft). Plants cover about 79% of the 72 sq ft bed when mature.

Guides for zone 7

Questions and answers

What hardiness zone is St. Louis, Missouri in?
Central St. Louis (ZIP 63101) is in zone 7a on the 2023 USDA map: the coldest night of an average winter falls between 0°F and 5°F. Suburbs can be half a zone colder.
When is the last frost in St. Louis?
Typically around Apr 5 in spring and Nov 1 in fall. These are typical dates; any one year can be two weeks earlier or later.
When should I plant shrubs and perennials in St. Louis?
In spring, mid-April to mid-May; in fall, late September to late October. Fall planting gives roots a cool, moist season to settle before summer.
How many plants do I need for a 12 × 6 ft bed in St. Louis?
Our full-sun bed list for St. Louis uses 13 plants of 5 kinds, plus 9 bags of mulch.

How this page was made

This page was generated from FloraVista's plant table by fixed rules: the rules engine composed each list for the city's 2023 USDA zone, its region's summers and its state's invasive lists. The frost dates and rainfall are approximate metro values. No person or chat model chose these plants, and no named expert has reviewed this page.

Data status: the plant table is awaiting review by a horticulturist. Check each plant with a local nursery or extension office before you buy.

Sources

  • Missouri Botanical Garden Plant Finder, state extension services and the USDA PLANTS database (zones, size, sun, water, bloom, native range)
  • ASPCA toxic and non-toxic plant lists (dog and cat toxicity)
  • Rutgers NJAES and regional extension deer-resistance ratings
  • State noxious-weed and invasive-plant lists and the Invasive Plant Atlas of the US
  • Typical US garden-centre listings (pot size and price band)
  • USDA Plant Hardiness Zone Map, 2023. Agricultural Research Service, U.S. Department of Agriculture. Data by the PRISM Climate Group, Oregon State University.
  • ZIP code to state data: GeoNames (geonames.org), licensed under CC BY 4.0.

Generated . How FloraVista chooses plants