When to Plant Guava in Santa Barbara County, CA
Santa Barbara County, California gardeners: here's your May plan
Here's what deserves your attention in Santa Barbara County, California this month. Everything below is tailored to Zone 10a and timed around your local frost dates.
Guava is a tropical fruit tree producing fragrant, vitamin C-rich fruits with pink, white, or yellow flesh. Some varieties can tolerate brief cold snaps.
Santa Barbara County, California is in USDA Zone 10a. The average last spring frost is February 28 and the first fall frost is November 24, giving you a growing season of approximately 269 days.
At an elevation of 2,364 feet, Santa Barbara County receives approximately 19.9 inches of rainfall annually with predominantly loam soil. Summer highs average 89°F, providing good warmth for Guava during the growing season. With low rainfall, drip irrigation is essential for growing Guava successfully. Mulch heavily to conserve soil moisture.
Santa Barbara County Soil Profile
Soil Type
Loam
Soil pH
6.5-7.2
Drainage
Well Drained
Plant Planting Risk Windows
Percentages indicate frost risk at transplant. The 70% safe window means there is a 30% chance of frost after transplant — suitable for cold-hardy crops or gardeners with frost protection. The 90% safe window is best for tender plants.
Soil Compatibility in Santa Barbara County
How your county's soil matches Guava's growing requirements.
Soil pH
Your soil pH (6.5–7.2) overlaps with Guava's range (5.0–7.0), though not a perfect match.
Soil Texture
The loam soil in Santa Barbara County is excellent for Guava — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is moderate (2.8%). Annual compost additions will help Guava.
How to Plant Guava
Plant Water Budget
Water stress score is 10/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Guava
Guava needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.
| Month | Guava Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 4" | 0" | ❄️ Dormant |
| Feb | 4.3" | 4.6" | 0" | ✅ Rainfall sufficient |
| Mar | 4.3" | 2.9" | 1.4" | 💧 Light watering |
| Apr | 4.3" | 1.8" | 2.5" | 🚿 Regular watering |
| May | 4.3" | 0.5" | 3.8" | 🚿 Regular watering |
| Jun | 4.3" | 0.1" | 4.2" | 🚿 Regular watering |
| Jul | 4.3" | 0" | 4.3" | 🚿 Regular watering |
| Aug | 4.3" | 0" | 4.3" | 🚿 Regular watering |
| Sep | 4.3" | 0.2" | 4.1" | 🚿 Regular watering |
| Oct | 4.3" | 0.8" | 3.5" | 🚿 Regular watering |
| Nov | 4.3" | 2.1" | 2.2" | 🚿 Regular watering |
| Dec | — | 2.9" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Feb–Nov in Santa Barbara County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Guava Heat Requirements (GDD)
What are Growing Degree Days (GDD)?
Growing Degree Days measure the total warmth your plants receive during the growing season. Think of it as a "heat bank" — every day above 50°F deposits warmth that helps your plants grow.
Each plant needs a certain amount of accumulated heat to mature. If your county provides more GDD than the plant needs, it's a great fit. If it's close, you may want to choose faster-maturing varieties or start seeds indoors to get a head start.
Guava Planting Timeline — Santa Barbara County, CA
Guava Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | March 14 | Mar 14 – Mar 28 |
· 36" apart · Rows 48" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Transplant Outdoors |
| April | — |
| May | — |
| June | — |
| July | — |
| August | — |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
1"/week · 2-3 times/week
📅 Days to Maturity
365–730 days
🧪 Soil pH
Needs 5–7 · Your soil: acceptable
🗺️ USDA Zone
Zone 10a
📆 Growing Season
269 days in Santa Barbara County
Growing Tips for Guava in Santa Barbara County
Direct sow Guava outdoors after February 28 in Santa Barbara County when soil has warmed and frost danger has passed.
Your 270.0-day growing season in Santa Barbara County is tight for Guava (365.0-730.0 days to maturity). Start indoors and choose early-maturing varieties.
Santa Barbara County receives only 20" of rain annually. Guava needs consistent moisture — install drip irrigation or water deeply 2-3 times per week.
General growing tips
Plant in a sheltered location with full sun. Water regularly during fruiting. In marginal zones, grow in large containers. Prune to maintain size and shape. Fruits ripen year-round in the tropics.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Guava in Other Locations
Frequently Asked Questions
When should I plant Guava in Santa Barbara County, CA?
Santa Barbara County is in Zone 10a with an average last frost of February 28. Plan your Guava planting based on this frost date — see the calendar above for exact timing.
What planting zone is Santa Barbara County, CA?
Santa Barbara County, California is in USDA Hardiness Zone 10a. The average last spring frost is February 28 and first fall frost is November 24.
Your Santa Barbara County Garden Planner — Free
A 24-page printable planner built for Santa Barbara County (Zone 10a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.