Gardening Resources
Our own dataset is drafted from these sources and cross-checked where we can. We link out because a local extension office or specialist knows your region better than a national one-size-fits-all chart — start here if you want to go deeper than our calendar and designer.
Growing In The Garden
Low desert (zone 9b/10a — Phoenix, Tucson)
Our flagship recommendation for low-desert gardeners. Run by a Phoenix-area horticulturist, it's the best plain-English source we found on the low desert's inverted dual growing season — the basis for this site's zone 10 planting windows.
UA Cooperative Extension — Maricopa County Planting Calendar
Low desert (zone 9b/10a — Phoenix, Tucson)
The University of Arizona's official research-based planting calendar for Maricopa County. We cross-checked our zone 10 data against this before publishing it.
Cornell Garden-Based Learning — Vegetable Growing Guides
Northeast
Detailed, research-based growing guides for over 50 vegetables from Cornell University's Garden-Based Learning program.
UF/IFAS Gardening Solutions — Vegetables
Southeast (Florida)
University of Florida's Florida-Friendly guide to year-round vegetable gardening in a climate where the growing calendar looks nothing like the rest of the country.
Oregon State University Extension — Vegetable Gardening
Pacific Northwest
OSU Extension's home-gardening hub, with region-specific guidance for the Willamette Valley, coast, and high desert areas of Oregon.
Iowa State University Extension — Yard and Garden
Midwest
Iowa State's home-gardening resource for the Midwest's shorter, more compact growing season, from soil prep through harvest and storage.
Don't see your region? Search "[your state] cooperative extension vegetable gardening" — nearly every state has one, and they're free, unbiased, and calibrated to your actual climate.