Growing Cucumber

Best Planting Times for Cucumbers in Oregon

Planting MethodActivityRecommended Dates
Outdoor PlantingIndoor Seed StartingMay 1 – June 1
Transplant OutdoorsJune 15 – July 1
Greenhouse PlantingYear-roundAdjust planting based on temperature control in the greenhouse

Planting Conditions

Cucumber Planting Conditions

Oregon’s diverse climate and varying growing zones offer unique challenges and advantages for growing cucumbers. It is important to consider the specific conditions in your area to ensure successful cultivation of this vegetable.

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Useful Tools for Starting Cucumbers Indoors

Using the right tools can save you time and increase your success rate.

Seeds

Quality seeds lead to better germination and healthier plants. Starting with high-quality seeds gives your cucumbers the best chance to thrive from the very beginning.
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Planting Trays

Planting trays help you organize your seedlings and ensure they have enough space to grow before you transplant them outdoors. This makes the process more efficient and increases the chances of strong, healthy plants.
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Grow Lights

Grow lights are essential if you don’t have enough natural sunlight. They provide your seedlings with the light they need to grow strong and healthy, even in less-than-ideal conditions.
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Seed Starting Soil

Using light, fine soil specifically designed for seed starting helps young roots establish quickly and promotes healthy growth. It’s an easy way to give your seedlings the best start possible.
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Greenhouse Growing

In Oregon, where temperature variations can impact cucumber growth, a greenhouse offers a controlled environment for cultivation. Greenhouses provide protection from extreme weather conditions, extend the growing season, and allow for year-round planting with proper climate management.

Consider investing in a 10×12 FT Greenhouse for $1,199 to ensure optimal cucumber growth throughout the year.
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Fertilizer

Supplementing with fertilizer is beneficial for growing robust and productive cucumber plants in Oregon. Quality fertilizer enriches the soil with essential nutrients, fostering strong plant development and abundant yields.
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Plant cucumbers outdoors in Oregon approximately 1-2 weeks after the last spring frost date for optimal growth.

Average Last Frost Dates for Oregon’s Major Cities

CityAverage Last Frost Date
PortlandApril 10
EugeneApril 20
SalemApril 15
CorvallisApril 25
BendMay 25
MedfordApril 5
AshlandApril 10
BeavertonApril 5
HillsboroApril 12
AlbanyApril 20

Disclaimer: Frost dates are average estimates, and actual conditions may vary. It is recommended to monitor local forecasts and adapt planting decisions accordingly.

Other planting guides for Oregon:

Kale Planting in Oregon

Broccoli Planting in Oregon

Pumpkin Planting in Oregon

Any questions on growing cucumbers? Visit our forum to discuss: Growing Cucumbers.

Starting Cucumbers Indoors

In cities like Portland, Oregon, begin indoor cucumber seed starting between April 1 and May 1. This timeline ensures healthy seedlings ready for outdoor transplantation starting from mid-May to early June once the risk of frost has passed.

Transplanting Cucumber Seedlings

Transplant cucumber seedlings outdoors from May 15 to June 1 in Oregon, ensuring the soil has warmed above 60°F consistently. Space the seedlings 12-24 inches apart in rows with at least 36 inches between rows for optimal growth.

General Care and Maintenance

Watering

  • Provide consistent and deep watering to maintain evenly moist soil. Oregon’s varying climate necessitates adjusting watering schedules accordingly.
  • Water at the base of plants to avoid leaf wetness, reducing the risk of fungal diseases.

Fertilizing

  • Apply a balanced fertilizer during planting and when the first fruits start forming. Incorporating compost before planting can enhance soil fertility and structure.

Pest and Disease Management

  • Regularly monitor for common pests like aphids, cucumber beetles, and powdery mildew. Oregon’s moist climate can contribute to pest and disease issues, so proactive management is crucial.
  • Implement organic or integrated pest management methods to protect cucumber plants from pests and diseases.

Harvesting

  • Harvest cucumbers when they reach the desired size and color. Regular harvesting promotes continuous fruiting and prevents over-mature fruits.
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