Growing sunflowers in zone 3 is doable, despite the short growing season. Not only do sunflowers come in a variety of bright and vibrant colors, but they are also hardy flowers that can survive the cold winters of zone 3. Sunflowers are resilient and require minimal care, making them an ideal choice for those who are looking for a low-maintenance flower to add to their garden.
They are also a great way to bring warmth, beauty, and color to a garden, even when the temperatures start to drop. With a few tips and tricks, anyone can learn how to successfully grow sunflowers in zone 3 and enjoy the beauty of these cheerful blooms.
Growing sunflowers in zone 3
Growing sunflowers in zone 3 can be tricky due to the cold climate. Sunflowers need lots of sunlight and temperatures above 60 degrees Fahrenheit to thrive, which can be hard to come by in colder climates. To increase your chances of success, start seeds indoors several weeks before the last frost and then transplant them outdoors once the danger of frost has passed.
Sunflowers also need full sun for at least 6 hours a day, so make sure to choose a planting location that is sunny and free of shade. While growing sunflowers in a cold climate can be difficult, if you give them the right environment and care, they can still thrive and bring you plenty of beautiful blooms.
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 zone 3
Sunflower seeds should be started indoors 4 weeks before your final frost date. In zone 3, the final frost date is around May 15th. You should also consider the size of the variety of sunflower you are planting, as shorter varieties can be planted earlier and taller varieties will need to be started later. Sunflowers should be started indoors around April 17th in zone 3.
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 zone 3
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!