Zone 13a Planting Calendar: What to Plant Each Month
The coldest night of the winter averages 60°F to 65°F in zone 13a. Where it is, when its frosts come, and what to do in the garden each month, from extension service guidance.
Where zone 13a is
Zone 13a covers 102 ZIP codes in Hawaii and Puerto Rico: Hawaii (2).
Its NOAA stations record no spring freeze in most years.
Cities and towns in zone 13a
Tap a town for its own frost dates and this month’s jobs; a hill or a valley a few miles off can be half a zone either side.
Zone 13a planting calendar
What to start, sow, plant, divide, prune, mulch and protect in zone 13a, month by month. Every job names the extension service page it rests on; open “Where this comes from” under a job to read their words.
Most of zone 13a sees no frost to count from, so the vegetable months come straight from University of Hawaii at Manoa CTAHR Cooperative Extension’s Home Gardening in Hawaii for Hawaii's low elevations (0 to 1,000 feet).
Pick a month above to see every job in it.
The year at a glance
- Plant vegetables: Low elevations (0 to 1,000 feet)all year
The zones next to 13a
Each half zone is five degrees. Zone 12b is five degrees colder at 55°F to 60°F. Zone 13b is five degrees warmer at 65°F to 70°F.
Zone 13a questions
Your own dates, by ZIP
Sources. USDA Plant Hardiness Zone Map, ZIP code tables (2023 and 2012), PRISM Climate Group, Oregon State University; USDA Plant Hardiness Zone Map; USDA Unveils Updated Plant Hardiness Zone Map (USDA Agricultural Research Service, November 15, 2023); NOAA NCEI U.S. Climate Normals 1991-2020, annual/seasonal, by station (v1.0.1); NC State Extension Gardener Plant Toolbox. Zone frost dates are the medians of the NOAA 1991 to 2020 station normals inside the zone.
The calendar’s extension sources:
- UNH Cooperative Extension, Growing Vegetables: When to Plant your Vegetable Garden, read Sep 21, 2026.
- University of Minnesota Extension, Planting vegetables in midsummer for a fall harvest, read Oct 9, 2026.
- University of Illinois Extension, Planting a fall vegetable garden (Good Growing), read Oct 9, 2026.
- University of Minnesota Extension, Dividing perennials, read Oct 9, 2026.
- Iowa State University Extension and Outreach, How should I prepare my perennial beds for winter?, read Oct 9, 2026.
- University of Minnesota Extension, Pruning trees and shrubs, read Oct 9, 2026.
- Rutgers NJAES Cooperative Extension, Pruning Flowering Shrubs (FS1221), read Oct 9, 2026.
- University of Maryland Extension, Planting a Tree or Shrub, read Oct 9, 2026.
- University of Wisconsin-Madison Division of Extension, Preparing Landscape Plants for Winter, read Oct 9, 2026.
- University of Wisconsin-Madison Division of Extension, Storing Tender Bulbs for Winter, read Oct 9, 2026.
- Iowa State University Extension and Outreach, All About Tulips, read Oct 9, 2026.
- UF/IFAS Gardening Solutions, Tulips, read Oct 9, 2026.
- UF/IFAS Gardening Solutions, Preparing the Landscape for Cold Weather, read Oct 9, 2026.
- UF/IFAS Gardening Solutions, Treating Cold-Damaged Plants, read Oct 9, 2026.