When to plant in Paradise Valley, AZ
USDA Zone 10aEverything below — frost dates, hardiness zone, and what to plant when in Paradise Valley, Arizona — is derived from the closest NOAA station with complete climate normals.
A generous ~354-day season lets Paradise Valley gardeners direct-sow more and still ripen long-maturity crops like melons and winter squash. Zone 10a is warm enough that Paradise Valley can grow subtropical perennials, and the short (or absent) frost period barely limits the annual calendar.
Frost probability
SCOTTSDALE MUNI AP · 1991–2020The date the last spring and first fall frost occur, by threshold and probability. A 90% date is later in spring — and earlier in fall — than a 10% date; the 50% · 32°F row is what most gardeners plan around. These are Paradise Valley’s own odds, recorded at SCOTTSDALE MUNI AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Feb 26 | Jan 30 | Jan 3 | Nov 25 | Dec 11 | Dec 30 |
| 32°F | Feb 7 | Jan 6 | Dec 16 | Dec 4 | Dec 26 | Jan 20 |
| 28°F | Jan 20 | Jan 2 | Dec 15 | Dec 14 | Jan 1 | Jan 17 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Nothing new to sow or transplant outdoors in the next few weeks — a seasonal lull. Check the full-year calendar below for the next window.
Full-year planting calendar
Each bar is the exact window to take a planting action in Paradise Valley, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 15 km · complete 32°F normalsWhen stations disagree by more than a few days, that spread is real microclimate variation — elevation, water, urban heat. Judge which station best matches your own yard.
Paradise Valley planting FAQ
When is the last spring frost in Paradise Valley, AZ?
Paradise Valley's average last spring frost falls near January 6 — the 50% mark at 32°F in the 1991–2020 normals. Hold tender transplants until the risk has passed, then plant out.
When is the first fall frost in Paradise Valley, AZ?
In Paradise Valley, the first 32°F freeze of fall lands around December 26 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Paradise Valley in?
Paradise Valley is in USDA hardiness zone 10a. In zone 10a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Paradise Valley?
There are roughly 354 frost-free days in Paradise Valley (a long growing season), running from the average last frost around January 6 to the first fall frost near December 26.
When should I plant tomatoes in Paradise Valley?
In Paradise Valley, start tomato seeds indoors around November 11–November 25, then transplant seedlings outdoors around January 13 once the danger of frost has passed.
Never miss a window in Paradise Valley
An email when it’s time to start seeds, transplant, and sow — timed to Paradise Valley’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Phoenix · 12 km
- Scottsdale · 17 km
- Tempe · 18 km
- Glendale · 21 km
- Fountain Hills · 22 km
- Mesa · 28 km
- Sun City · 31 km
- Chandler · 32 km
Frost dates recorded at SCOTTSDALE MUNI AP, 9 km from the city center · 1991–2020 NOAA climate normals · zone from the USDA/PRISM 2023 map. How we compute this.
BlissGarden. "When to Plant in Paradise Valley, AZ — Frost Dates & Zone 10a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00003192. Retrieved from https://blissgarden.com/arizona/paradise-valley.