Coreopsis is a beautiful flowering plant that can easily be grown from seeds. Whether you choose to grow annual or perennial species, starting them from seeds is a great option. It usually takes about two to three weeks for the seeds to germinate, which makes it a relatively quick and easy process.
To get started, you have a couple of options. If you prefer to sow the seeds directly in your garden, early spring is the best time to do so. However, if you want to get a head start or if you live in an area with a shorter growing season, you can start the seeds indoors about 6 to 8 weeks before the last frost.
When starting the seeds indoors, you’ll need to gather the necessary supplies. You’ll need seed starting trays or pots, a good quality seed starting mix, and of course, the coreopsis seeds themselves. Fill the trays or pots with the seed starting mix, making sure to moisten it slightly before planting the seeds.
Now, here’s a tip that many people overlook when it comes to coreopsis seeds: they need light for germination. Unlike some other seeds that require darkness to sprout, coreopsis seeds actually need exposure to light. So, when planting the seeds, make sure not to cover them with soil. Simply press them gently into the moistened seed starting mix, ensuring good contact between the seed and the growing medium.
Once the seeds are planted, place the trays or pots in a location where they will receive plenty of sunlight. A south-facing window or a grow light setup are both good options. Keep the soil evenly moist, but be careful not to overwater, as this can lead to damping off or root rot.
In a matter of weeks, you should start to see the tiny seedlings emerge from the soil. At this point, you can begin to gradually acclimate them to outdoor conditions. This process, known as hardening off, involves exposing the seedlings to increasing amounts of sunlight and outdoor temperatures over a period of several days or weeks. This helps the plants adjust to the harsher conditions they will face in the garden.
Once the danger of frost has passed and the seedlings are hardened off, you can transplant them into your garden. Choose a sunny spot with well-draining soil for best results. Space the plants according to the recommended spacing for the particular coreopsis species you are growing.
Throughout the growing season, make sure to water the plants regularly, especially during dry periods. Coreopsis is generally a low-maintenance plant, but adequate water is crucial for healthy growth and abundant flowering. Deadheading spent blooms can also help encourage more flowers and prolong the blooming period.
Growing coreopsis from seed is a relatively easy and rewarding process. With a little bit of planning and care, you can enjoy the vibrant colors and delicate beauty of these lovely flowers in your garden.
