Growing sunflowers in North Dakota is a truly rewarding experience. Sunflowers are a beautiful addition to any garden, and they make an excellent choice for North Dakota’s climate. They are hardy and easy to grow, and they provide a stunning backdrop to any outdoor space.
Not only do sunflowers bring a cheery pop of color to the garden, but they are also beneficial for wildlife, providing food and shelter for birds and other small animals. With plenty of sunshine and the right conditions, sunflowers can thrive in North Dakota, making them a great choice for any gardener.
North Dakota’s climate and growing zones
Zone 2b is located in the northwestern part of the state, where the average winter minimum temperature is -30 to -20 degrees Fahrenheit. This zone is suitable for cold-hardy plants such as raspberries, currants, and several types of conifers, as well as perennials such as geraniums, asters, and daylilies.
Zone 3a is located in the northern and eastern sections of the state. Here, the average winter minimum temperature is -20 to -10 degrees Fahrenheit, so more cold-sensitive plants can thrive. This zone is suitable for a wider variety of plants, including roses, blackberries, apples, and some types of fruit trees.
Zone 4a is located in the central and western parts of the state. The average winter minimum temperature here is -10 to 0 degrees Fahrenheit, so more tender plants can survive. This zone is suitable for a wide range of fruits and vegetables, including tomatoes, peppers, squash, and melons.
Zone 5a is located in the southeastern part of the state. The average winter minimum temperature here is 0 to 10 degrees Fahrenheit, so even more tender plants can survive. This zone is suitable for a wide variety of fruits and vegetables, including corn, beans, and cucumbers, as well as some types of flowers.
Zone 6a is located in the southwestern corner of the state. The average winter minimum temperature here is 10 to 20 degrees Fahrenheit, so it is suitable for the most cold-sensitive plants. This zone is suitable for a wide variety of vegetables and fruits, as well as some types of flowers.
Growing sunflowers in North Dakota
Growing sunflowers in North Dakota is no easy feat. The cold climate of the state can present many challenges for this type of flower, as sunflowers require warm temperatures for optimal growth. The average high temperature in North Dakota during the summer months is only around 80 degrees Fahrenheit, which is too cold for sunflowers to thrive.
The lack of warmth in the air can cause difficulty for sunflowers, as the plant requires heat to promote blooming. The cold temperatures of North Dakota can also cause stunted growth or even death of the plant. The soil also needs to be warmer than usual in order to promote proper root development and growth.
In addition, the long, cold winters in North Dakota can make it difficult for sunflowers to survive. The plant requires a period of dormancy in order to flourish, but the cold temperatures and snow can be too much for sunflowers to handle.
Despite these difficulties, sunflowers can still be grown in North Dakota with the right environment and care. To start, it is important to select a location with a good amount of sun and soil that is not too cold. Adding mulch to the soil can help to keep the roots of the sunflower warm while providing additional nutrients. Planting the sunflower in late May or early June will give it enough time to grow before the cold temperatures of winter set in.
Some of my favorite varieties of sunflower include:
- Mammoth Grey Stripe Sunflower (Helianthus annuus) – 75-100 days to maturity
- Teddy Bear Sunflower (Helianthus annuus) – 60-90 days to maturity
- Red Sun (Helianthus annuus) – 65-95 days to maturity
- Autumn Beauty Sunflower (Helianthus annuus) – 75-90 days to maturity
- Lemon Queen Sunflower (Helianthus annuus) – 75-95 days to maturity
- Velvet Queen Sunflower (Helianthus annuus) – 90-110 days to maturity
- Dwarf Sunspot Sunflower (Helianthus annuus) – 60-90 days to maturity
- Giant Sungold Sunflower (Helianthus annuus) – 85-110 days to maturity
- Evening Sun Sunflower (Helianthus annuus) – 75-95 days to maturity
- Sundance Kid Sunflower (Helianthus annuus) – 75-95 days to maturity
When to start sunflowers indoors in North Dakota
Sunflower seeds should be started indoors 4 weeks before your final frost date. In North Dakota, the final frost dates are:
- Zone 2: Around May 22nd
- Zone 3: Around May 15th
- Zone 4: Around May 12th
- Zone 5: Around April 30th
- Zone 6: Around April 21
You should also consider the size of the variety of sunflower you are planting, as shorter varieties can be planted later and taller varieties will need to be started a week or two earlier. Sunflowers should be started indoors:
- Zone 2: Around April 24th
- Zone 3: Around April 17th
- Zone 4: Around April 14th
- Zone 5: Around April 1st
- Zone 6: Around March 24th
Starting sunflowers from seed is a relatively easy process that can be done both indoors and outdoors. To begin, you will need to purchase sunflower seeds from a garden center or online. When selecting seeds, make sure to look for the desired variety you want to grow. Once you have your seeds, you can choose to start them indoors 4 weeks before the last frost date for your region.
Fill a seed tray with starter soil and moisten it with a spray bottle. Place your seeds on top of the soil, cover them lightly with starter soil, and water them gently. Place the tray in a warm and sunny spot, and keep the soil moist. Once your plants have grown 2-3 sets of leaves, you can transplant them outdoors.
Planting sunflowers outside in North Dakota
Sunflower seeds should be planted outdoors after the last average frost date for your area. Planting sunflower seeds too early can result in poor germination and seedling growth and potentially death if there’s a hard freeze.
When planting outdoors, make sure the area has plenty of sunshine and well-draining soil. Dig a hole that is twice the size of the root ball, and fill the hole with compost or aged manure. Place the seedling in the hole and backfill with soil, then water deeply.
For the remainder of the sunflower’s life, make sure to keep the soil moist and fertilize regularly. With proper care, you should have beautiful sunflowers in no time!
When to harvest sunflower seeds in North Dakota
When sunflower seeds are ready to be harvested, the back of the flower head will be dry and start to turn brown. The individual seeds will be dry and firm. The green husks surrounding the seeds will have turned yellow or white and begun to dry out. To check if the seeds are ready to be harvested, lightly pinch the seed head between your thumb and forefinger. If the husks break open easily, the seeds are ready to harvest.
Harvesting sunflower seeds is easy. Cut the flower head off the stem and spread it out on a clean surface. To remove the seeds, use your hands to rub the flower head and release the seeds. Collect the seeds in a large bowl or container. Once the seeds are harvested, store them in an airtight container in a cool, dry place. Make sure the container is well sealed to keep the seeds from going bad. Sunflower seeds can last for up to a year if stored properly.
Sunflower seeds are delicious and nutritious snack food. They can be eaten raw, toasted, or sprouted. Sunflower seeds are also used in salads, cereals, granola, and energy bars. They are loaded with essential vitamins and minerals like Vitamin E, phosphorus, magnesium, and zinc. Sunflower seeds can also be used to make sunflower seed butter, which is a great alternative to peanut butter.
In addition to being a healthy snack, sunflower seeds are also used to make birdseed. You can leave your sunflowers intact outside well after the flowers have died to give your local birds a tasty snack!