When to Plant Raspberries in Multnomah County, OR
Raspberries are beloved bramble fruits producing sweet, delicate berries in red, golden, black, and purple varieties. They spread by underground runners and are very productive.
Multnomah County, Oregon is in USDA Zone 8b. The average last spring frost is April 14 and the first fall frost is October 27, giving you a growing season of approximately 196 days.
At an elevation of 357 feet, Multnomah County receives approximately 35.9 inches of rainfall annually with predominantly silt loam soil. Summer highs average 84°F, so choose short-season varieties of Raspberries to ensure they mature before fall.
Multnomah County Soil Profile
Soil Type
Silt Loam
Soil pH
5.8-6.3
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 Multnomah County
How your county's soil matches Raspberries's growing requirements.
Soil pH
Your soil pH (5.8–6.3) is within Raspberries's preferred range (5.5–6.5).
Soil Texture
The silt loam soil in Multnomah County is excellent for Raspberries — good drainage, moisture retention, and nutrient holding capacity.
Drainage
Drainage is adequate for Raspberries.
Organic Matter
Organic matter is excellent (4.5%) — Raspberries will thrive.
How to Plant Raspberries
Plant Water Budget
Raspberries Planting Timeline — Multnomah County, OR
Raspberries Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | May 5 | May 5 – May 19 |
· 24" apart · Rows 72" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | — |
| May | Transplant Outdoors |
| June | — |
| July | — |
| August | — |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
1"/week · 1-2 times/week
📅 Days to Maturity
365–730 days
🧪 Soil pH
Needs 5.5–6.5 · Your soil: ideal
🗺️ USDA Zone
Zone 8b
📆 Growing Season
196 days in Multnomah County
Growing Tips for Raspberries in Multnomah County
Direct sow Raspberries outdoors after April 14 in Multnomah County when soil has warmed and frost danger has passed.
Your 196.0-day growing season in Multnomah County is tight for Raspberries (365.0-730.0 days to maturity). Start indoors and choose early-maturing varieties.
General growing tips
Provide a trellis for support. Prune summer-bearing types by removing spent canes after harvest. For ever-bearing types, mow all canes in late winter for a single fall crop.
Companion Planting
Good Companions
Avoid Planting Near
Level Up Your Garden
Raspberries in Other Locations
Frequently Asked Questions
When should I plant Raspberries in Multnomah County, OR?
Multnomah County is in Zone 8b with an average last frost of April 14. Plan your Raspberries planting based on this frost date — see the calendar above for exact timing.
What planting zone is Multnomah County, OR?
Multnomah County, Oregon is in USDA Hardiness Zone 8b. The average last spring frost is April 14 and first fall frost is October 27.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Multnomah County gardeners in Zone 8b organize planting dates, track what's growing, and never miss a planting window.
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