Best Planting Times for Soybeans in Wyoming

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

Soybean Planting Conditions

Wyoming’s climate is characterized by cold winters and warm summers, with USDA Hardiness Zones varying from 3a to 6b. This presents unique challenges for soybean cultivation, necessitating careful timing and adaptation to local conditions.

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Useful Tools for Starting Soybeans 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 soybeans the best chance to thrive from the very beginning.
Soybean Seeds
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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.
Planting Trays Image
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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.
Grow Lights Image
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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.
Seed Starting Soil Image
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Greenhouse Growing

In Wyoming’s colder climates, utilizing a greenhouse offers significant advantages for soybean cultivation. Greenhouses provide a controlled environment that shields plants from harsh weather conditions, enabling optimal growth and extending the growing season. Additionally, they ensure more stable temperatures and protection from wind, boosting the overall health of the soybean crops.

Consider investing in a 10×12 FT Greenhouse priced at $1,199 to ensure your soybeans thrive in a controlled environment.
Greenhouse Image 1
Greenhouse Image 2
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Fertilizer

For optimal soybean growth in Wyoming, supplementing with fertilizer can ensure abundant and healthy harvests. Quality fertilizer helps replenish nutrients in the soil and promotes vigorous plant growth.
Fertilizer Image
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Plant soybeans outdoors in Wyoming approximately 1-2 weeks after the last spring frost date, ensuring the soil is warm enough for optimal growth.

Average Last Frost Dates for Wyoming’s Major Cities

CityAverage Last Frost Date
CheyenneMay 20
CasperMay 25
LaramieMay 30
GilletteJune 5
Rock SpringsJune 10
JacksonJune 15

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

Other Resources

Other planting guides for Wyoming:

Broccoli Planting in Wyoming

Pumpkin Planting in Wyoming

Tomato Planting in Wyoming

Any questions on growing soybeans? Visit our forum to discuss: Growing Community Forum.

Starting Soybeans Indoors

In Wyoming, begin indoor soybean seed starting between April 15 and May 15. This timeline ensures the seedlings are robust and ready for outdoor transplantation starting from late May to early June, after the last frost has passed.

Transplanting Soybean Seedlings

Transplant soybean seedlings outdoors from June 1 to June 15, ensuring that the soil temperature remains above 55°F consistently. Space the seedlings 2-4 inches apart in rows that are 30-36 inches apart for optimal growth.

General Care and Maintenance

Watering

  • Provide consistent and deep watering to maintain evenly moist soil. Wyoming’s varying climate necessitates regular watering to prevent soil dryness, especially during hot spells.
  • Water at the base of the plants to prevent leaf wetness, minimizing the risk of fungal diseases.

Fertilizing

  • Apply a nitrogen-rich fertilizer at planting and when the plants start flowering. Incorporating compost before planting can improve soil fertility and structure.

Pest and Disease Management

  • Regularly monitor for common pests such as cutworms, aphids, and soybean loopers. Staying vigilant is key, even in Wyoming’s drier conditions.
  • Implement organic or integrated pest management methods to safeguard soybean plants from pests and diseases.

Harvesting

  • Harvest soybeans when they achieve the desired size and firmness. Timely harvesting encourages better yields and prevents over-mature pods.

The importance of good soil

Before starting to grow it is important to take a step back and find the condition of the soil in your garden,The optimal soil is a blend that includes the mineral-rich dirt along with organicrich organic matter that plants need to thrive.


In my garden I try to compost as mutch as possible, so I can mix in the nutrient ritch compost in my soil. I use both hot composting of food scraps and cold composting of all organic garden “waste”..
If you dont have the time or space for composting, it is possible to get compost ready to use in garden centers and Community Composting.
You can read more on Community Composting here: https://www.epa.gov/sustainable-management-food/community-composting

If you are uncertain of the quality of your soil, you can get easy to use soil tests at amazon for 17 dollars. Check latest prices here: Soil testing kit.

Also remember to check out how much sunlight your growing area gets, and that the rain drains well. If you treat your soil well and plan you crops according to your climate you will succeed with any plant you want.

The satisfaction when you harvest your own produce is well worth the time you put in 🙂

BeeJay
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