How reliable are the frost dates?

They’re zone-level averages, not microclimate-specific. Urban heat islands, elevation, and proximity to water can shift your actual frost dates by 1–3 weeks. Check your county extension office for local data.

What USDA zones does the planting schedule cover?

Zones 3 through 10, which cover most of the continental US. The planting windows shift by roughly 2 weeks per zone, with frost date estimates based on NOAA historical averages. Microclimates (urban heat islands, sheltered yards) can shift your actual dates by a week or more.

Gardening Planner

About Gardening Planner

Generates a planting calendar based on USDA hardiness zones (3–10). Select your zone and pick from 10 vegetables—tomatoes, lettuce, carrots, peppers, green beans, peas, spinach, radishes, broccoli, and onions. The tool calculates indoor sow dates, outdoor sow dates, and harvest windows relative to your zone’s last frost date. Each vegetable includes planting depth, spacing, sun/water requirements, and a companion planting guide showing compatible and incompatible neighbors.

Covers USDA zones 3–10 with per-zone last frost and first frost dates
10 vegetables with days-to-maturity ranging from 30 (radishes) to 100 (onions)
Indoor sow dates calculated as weeks-before-last-frost; outdoor dates as weeks-after
Companion planting data for each vegetable: good companions and plants to avoid
Sorted planting schedule displays earliest sow dates first

Frequently Asked Questions

How reliable are the frost dates?: They’re zone-level averages, not microclimate-specific. Urban heat islands, elevation, and proximity to water can shift your actual frost dates by 1–3 weeks. Check your county extension office for local data.
What USDA zones does the planting schedule cover?: Zones 3 through 10, which cover most of the continental US. The planting windows shift by roughly 2 weeks per zone, with frost date estimates based on NOAA historical averages. Microclimates (urban heat islands, sheltered yards) can shift your actual dates by a week or more.

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