![]() The leaves of zinnia sprouts are oval and green. ![]() ![]() If you want to save seeds for next year’s growing season, you should let the flower heads dry out. Again, because Zinnias are annuals, they won’t come back the next year unless their seeds land on bare ground. Once your Zinnias bloom, you can start cutting off the spent blooms to make room for new ones. Zinnias are beautiful cut flowers used in many arrangements and bouquets. Once the plants are established, they will bring lots of good bugs to the garden because they will flower all summer. You can read this information on the back of every seed Needs packet. If you want to know more about how your seeds will grow, like how tall they will get and how far apart they will be, you should always look at the seed packet. You won’t have to wait an eternity for the cheerful blooms of zinnias to appear on the scene, despite being one of the easiest annual flowers to grow from seed.ĭepending on the plant type, they can be anywhere from 12 inches to 48 inches tall and 8 to 24 inches apart. Cooler spring temperatures can slow down the first flowers, but when it warms up, they catch up quickly.īlooming zinnias ( Zinnia spp.) fill gardens with a sea of nonstop color from summer to fall, sparkling in every color but blue. Ironically, it can take up to 12 weeks for the smaller zinnia species ( Zinnia angustifolia, etc.) to bloom from seed. If the weather is warm, you can have flowers in less than two months after you plant the seeds. The Zinnia elegans species gives rise to the large-flowered zinnias, which bloom 45 to 60 days after being planted. Care Tips for Zinnia Seedlings How Long Do Zinnias Take To Bloom After Germination?.How Long Do Zinnias Take To Bloom After Germination?.I find that both my vegetables and zinnias are healthier when planted together. Water: Zinnias do need regular watering especially if you are growing zinnias in containers.įertilizing: Zinnias should be fertilized at least twice during the growing season with a balanced NKP (nitrogen (N), phosphorus (K), and potassium (P)) fertilizer with a formulation of 20-20-20.Ĭompanions: Zinnias can be interplanted within a vegetable garden to attract pollinators or as a row along a vegetable garden. closer than recommended on the seed package). To encourage longer stems, plant zinnias closer together (e.g. Spacing: Follow the guidelines on the back of the seed package for plant spacing. Soil should have a pH between 5.5 and 7.5. It is best to work compost into the soil in the fall for a spring planting. For information on making compost at home, reference my blog titled “ Recipes for Compost”. Compost can be made at home or purchased from a garden center. Soil: Zinnias prefer a soil that is fertile, well-drained and amended with organic matter (e.g. Light: Zinnias like full sun with at least 6 hours of sunlight a day. For a full guide on starting plants from seeds, see my blog post titled “ The complete guide to starting plants from seeds indoors”. Hardening off can be done in a cold frame or by simply placing the plants outdoors for a couple of hours each day for one to two weeks. Hardening off is the process of gradually acclimating the plant to the outdoors. It is also important to ‘harden off’ the transplants before being planted in the ground. This ensures that the roots have a good amount of space to grow before being transplanted outdoors. When I grow the 3-4-foot variety, I start my seeds in 2×2 inch containers. If starting seeds indoors, chose the size container based upon the grown height of the zinnia. Once the seedling emerges, it will take anywhere from 1-3 months for the flowers to appear. When the soil reaches a minimum temperature of 60☏., zinnias can be planted outdoors. Zinnias will germinate in five to seven days in temperatures above 65☏. They can either be started indoors from seed (4-6 weeks before the last frost) or directed seeded outdoors after danger of frost has passed. One of the reasons that zinnias are so popular is because they are easy to grow and will bloom all summer and into the fall until the first frost.
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