When to Plant Tomatoes in Oregon

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Quick Answer: When to Plant Tomatoes in Oregon

The ideal time for germination of seeds in Oregon is early March. The seeds require a soil temperature of 60-65 degrees F. Transplanting can be done around the end of May or early June. The site should have proper sunlight and no shade. The water drainage system of the garden should be efficient. Support your tomato plants for maximum yield. Mulch and Prune the tomato plants for weed control and other advantages.

This article contains all relevant information on tomato planting in Oregon.

It covers all the basics for growing and planting tomatoes in Oregon.

Let us get started!

Best Time to Plant Tomatoes in Oregon

The criteria for planting and sowing seeds should be based on frost and the maturation days of the chosen tomato variety.

April and May are best suited months for transplanting the tomatoes outside. However, one should wait for 15-20 days after the last frost before planting tomatoes outside.

Tomato plants thrive in a moderate climate. Providing them with sudden heat and extreme cold can act as a shock for the plants. Two weeks before the last frost, put the tomato plants in the shade and under sunlight.

Six to eight weeks before the last frost, sow your plant seeds indoors.

To maximize tomato production in Oregon, provide plants with eight-plus sunlight every day.

Tomato sustains in the soil temperature of 60-70 degrees F . The daytime temperature is 70-80 degrees F; the nighttime temperature should not fall below 55 degrees F.

Depending on the rainfall of Oregon and how hot the weather is, plants demand additional or less water.

In areas of maximum rainfall, one should not water the plants every day. In areas of low rainfall, water your plants at least 1-2 inches deep.

Do not provide excessive water to the plants. Prevent wetting of the foliage.

Table: Frost Dates For Oregon

CityFirst Frost DateLast Frost Date
LakeviewSeptember 29May 18
ArlingtonOctober 15April 20
FlorenceNovember 10April 16
HuntingtonOctober 5April 30

How to Take Care of Tomatoes in Oregon

A healthy tomato needs an immense supply of organic matter and elements like calcium, sulfur, nitrogen, phosphorous, and potassium.

To achieve these requirements you should –

Mulch the soil with a thick layer of leaf, hay, or straw, and organic matter. Mulching provides the soil by retaining soil moisture and preventing weed growth.

A few other things you should do to grow healthy tomato plants are –

  • Provide deep moisture to the plants. Use well-drained and fine-textured soil.
  • Place the plant in a sunny site and protect them from excessive heat, wind, and heavy rainfall.
  • Stake and cage the tomato plants for physical support. Keep a distance of 24-36 inches between two staked plants.
  • Maintain good garden sanitation practices. As the plant grows, prune all the dead suckers, stems, and leaves.
  • Supplement the soil with an organic and balanced fertilizer. Apply it evenly to the base of the plant.


How does the harvesting time differ in Determinate and Indeterminate varieties?

Determinate tomato varieties, fruits ripen at the same time whereas; in the case of indeterminate variety, fruits ripen over a long season.

What tomatoes grow best in Oregon?

The Determinate Varieties are Oregon Spring, Santiam, Siletz, Willamette, and Legend.
The Indeterminate Varieties are Brandywine, Early Girl, and Beef steak.
The Cherry Varieties are Golden Cherry, Golden Nugget, Sun Gold, Sweet baby girl, and Oregon Cherry.


I am sure that this article has helped you grow beautiful tomatoes in your Oregon garden.

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