Growing Kohlrabi in Portland
🇺🇸 Zone 7 Planting Guide · Warm-summer Mediterranean climate
Quick Answer: Growing Kohlrabi in Portland
Yes, you can grow Kohlrabi in Portland, US! Plant during Jan, Feb, Mar, Sep, Oct for best results. Portland is in USDA Zone 7 with a Warm-summer Mediterranean climate, offering 240 frost-free days per year. The difficulty level is medium, and Kohlrabi takes 45-60 days to harvest. Kohlrabi needs full sun and regular watering.
Climate Match Analysis
Portland's climate requires careful timing. Summer highs (27°C) exceed Kohlrabi's maximum (24°C), so plant early or provide shade. Follow the recommended planting months for success.
Portland Climate Data
Kohlrabi Planting Calendar for Portland
Green months show the best time to plant Kohlrabi in Portland
Kohlrabi Growing Requirements
Sunlight
Full Sun
6+ hours direct sunlight
Water
Regular
Consistent moisture, 1-2 inches/week
Days to Harvest
45-60
From planting to first harvest
Difficulty
Some experience helpful
💡 Growing Tips for Kohlrabi
Harvest when tennis-ball sized. Larger ones become woody. Can be planted 2-3 weeks before the last expected frost, giving it a head start on the growing season. Aim for about 2.5 cm of water per week, adjusting for rainfall. Organic mulch around the base helps maintain even moisture.
Frost tolerance: Kohlrabi is frost tolerant — you can plant earlier in spring.
How to Grow Kohlrabi in Portland
Portland, US is in USDA Hardiness Zone 7 with a Warm-summer Mediterranean climate (Köppen Csb). With winter lows of 2°C and summer highs of 27°C, the growing season spans approximately 240 frost-free days. Kohlrabi grows well with some gardening knowledge in this climate.
Kohlrabi thrives in temperatures between 10°C and 20°C, requiring full sun and regular watering. In Portland, the best months to plant Kohlrabi are January, February, March, September, October. Since Kohlrabi can tolerate frost, you have flexibility to plant earlier in the season or extend into cooler months. Expect to harvest in approximately 45-60 days after planting.
Portland receives 1090mm of annual rainfall, which provides good natural moisture for Kohlrabi. Supplement with additional watering during dry spells.
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More plants you can grow alongside Kohlrabi in Portland
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Frequently Asked Questions
Can I grow kohlrabi in Portland?
Yes! Kohlrabi can be successfully grown in Portland, US. Portland is in USDA Hardiness Zone 7 with a Warm-summer Mediterranean climate. The difficulty level for growing Kohlrabi here is rated "medium". The best months to plant are January, February, March, September, October.
When should I plant kohlrabi in Portland?
In Portland, the recommended planting months for Kohlrabi are January, February, March, September, October. Portland has 240 frost-free days per year, with winter lows of 2°C and summer highs of 27°C. Kohlrabi is frost tolerant, giving you more flexibility with planting dates.
How long does kohlrabi take to grow in Portland?
Kohlrabi typically takes 45-60 days from planting to harvest. In Portland's Warm-summer Mediterranean climate with 240 frost-free days, you have plenty of time to grow Kohlrabi to maturity. Harvest when tennis-ball sized. Larger ones become woody. Can be planted 2-3 weeks before the last expected frost, giving it a head start on the growing season. Aim for about 2.5 cm of water per week, adjusting for rainfall. Organic mulch around the base helps maintain even moisture.
Can I grow kohlrabi indoors in Portland?
Kohlrabi can potentially be grown indoors in Portland with proper conditions. It requires full sun (6+ hours of direct light — a south-facing window or grow lights recommended). Indoor growing extends your season beyond the Jan, Feb, Mar, Sep, Oct outdoor planting window. Use containers with good drainage and regular watering.
What month do I plant kohlrabi in Portland?
Plant Kohlrabi in Portland during January, February, March, September, October. These are the optimal months based on Portland's USDA Zone 7 climate, 240 frost-free days, and temperature range of 2°C to 27°C.
Is kohlrabi hard to grow in Portland?
Kohlrabi is rated "medium" to grow in Portland. Some gardening experience is helpful. Pay attention to watering schedules and planting timing. The climate match for Kohlrabi in Portland is Moderate.
What grows well with kohlrabi in Portland?
In Portland, you can grow many companion plants alongside Kohlrabi. Good options from the same planting window include Tomato, Basil, Lettuce, Carrot and 2 more. These plants share similar planting months and thrive in Portland's Zone 7 climate.
Does kohlrabi need full sun in Portland?
Kohlrabi requires full sun. In Portland, provide at least 6 hours of direct sunlight daily. Most garden locations with southern exposure will work well.