When to plant in Tamalpais-Homestead Valley, CA
USDA Zone 10aEverything below — frost dates, hardiness zone, and what to plant when in Tamalpais-Homestead Valley, California — is derived from the closest NOAA station with complete climate normals.
Tamalpais-Homestead Valley enjoys a long ~336-day frost-free season — you can succession-sow, fit in a second crop, and grow long-season heat-lovers with room to spare. Zone 10a is warm enough that Tamalpais-Homestead Valley can grow subtropical perennials, and the short (or absent) frost period barely limits the annual calendar.
The average last spring frost in Tamalpais-Homestead Valley is now 10 days earlier than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
KENTFIELD · 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 Tamalpais-Homestead Valley’s own odds, recorded at KENTFIELD.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 5 | Mar 5 | Jan 29 | Nov 12 | Nov 29 | Dec 21 |
| 32°F | Feb 25 | Jan 16 | Dec 21 | Nov 30 | Dec 18 | Jan 19 |
| 28°F | Jan 23 | Dec 30 | Dec 9 | Dec 4 | Dec 24 | Jan 21 |
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 Tamalpais-Homestead 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.
Tamalpais-Homestead Valley planting FAQ
When is the last spring frost in Tamalpais-Homestead Valley, CA?
Plan for the last spring frost in Tamalpais-Homestead Valley around January 16 (the date it has a 50% chance of a 32°F freeze). Anything frost-sensitive should go out after it.
When is the first fall frost in Tamalpais-Homestead Valley, CA?
Expect Tamalpais-Homestead Valley's first fall frost near December 18 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Tamalpais-Homestead Valley in?
Tamalpais-Homestead 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 Tamalpais-Homestead Valley?
There are roughly 336 frost-free days in Tamalpais-Homestead Valley (a long growing season), running from the average last frost around January 16 to the first fall frost near December 18.
When should I plant tomatoes in Tamalpais-Homestead Valley?
In Tamalpais-Homestead Valley, start tomato seeds indoors around November 21–December 5, then transplant seedlings outdoors around January 23 once the danger of frost has passed.
Never miss a window in Tamalpais-Homestead Valley
An email when it’s time to start seeds, transplant, and sow — timed to Tamalpais-Homestead Valley’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Mill Valley · 3 km
- Corte Madera · 6 km
- Larkspur · 7 km
- San Rafael · 12 km
- San Anselmo · 12 km
- Richmond · 18 km
- Albany · 19 km
- San Pablo · 19 km
Frost dates recorded at KENTFIELD, 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 Tamalpais-Homestead Valley, CA — Frost Dates & Zone 10a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00044500. Retrieved from https://blissgarden.com/california/tamalpais-homestead-valley.