Note the planting date, and approximately how many days until maturity per package instructions. Pfft. Whether you choose a small or a large variety, they will need plenty of personal space. Poke seeds into the soil about one-half inch (1 cm) deep and 3 inches (8 cm) apart. Zinnias can also be grown from seed. Soil: Zinnias grow best on fertile, well-drained soils high in organic matter. Although you can grow zinnias from seed, it’s easiest to start with small bedding plants from a garden center or nursery. Therefore, the best time to start with seeds is by sowing them indoors in early spring. Start seeds indoors in individual containers, set out purchased plants, or direct-sow into warm soil. Poke seeds into the soil about one-half inch (1 cm) deep and 3 inches (8 cm) apart. By sowing zinnia seeds early in the year, you can enjoy riotous colour from midsummer until the first frosts. Depending upon the type of zinnias, they can grow from 8 inches to 4 feet tall, so before selecting zinnia seed, consider where they will be planted. Even though zinnias are fast-growing plants, starting zinnia seeds indoors can help you get an even faster jump on the growing season, a plus if you're growing zinnias … The profusion zinnia is no different. They can be sown in the ground or the garden after the last frost date. Our Garden Plannercan produce a personalised calendar of when to so… If you’d like a quicker start to enjoying your zinnias, you may start the seeds indoors. This hardy shrub is usually £14.99 per 3L plant. Zinnia seeds will germinate in five to seven days when exposed to a constant temperature of 75 to 78 degrees Fahrenheit. From the team at Gardeners' World Magazine. The seeds are small and arrow-shaped. Most zinnias have soft, furry, light green leaves that vary in width depending on the species and are … Be sure to plant your zinnia seeds a few inches apart to give them room to grow properly. It’s best to allow them to fully dry on your plants, but if it’s going to rain you can clip them and let them continue to dry for 1 to 4 weeks indoors. Sow two or three seeds 2in (5cm) apart at 12in (30cm) spacing. Seeds of zinnia flowers should usually be sown directly into the sunny flower bed, as developing roots do not like to be disturbed. Maintain a soil temperature of 21-26°C (70-80°F). That will make transplanting your annuals into the garden easier and more successful. Just as for the sunflowers, I usually plant my seeds about 1/4-inch deep indoors at about the time of our final frost date. The seeds are large enough to easily handle and are easy to plant outdoors in a well-prepared garden bed or in containers indoors to set out after all danger of frost. Spread the seed heads and seeds in a single layer in shallow paper box or tray on a table indoors. No matter which type of zinnia you choose, to get a head start on the blooming season, start the seeds indoors. Planting out your zinnias Zinnias bloom from April to November. Plant your sm… Zinnia Seeds Germination. Water thoroughly and thin to 6 to 12 inches apart after seedlings have sprouted. In this video I will be showing you how I grow zinnias from seed and I will be showing you an update in the zinnia seedlings that I have growing. Starting seeds in peat pots will do away with the need to re-pot as they grow. Save money and fill your summer shade gardens with masses of beautiful begonias. Larger plugs may become substantial enough to plant directly into hanging baskets or display tubs; Growing on Mums take up to four months to flower from seed. There are different varieties of zinnia plants. (I also grow zinnias indoors, and am doing so now.) Plant zinnia seeds a quarter inch (.6 centimeter) deep. Growing healthy Zinnia plants and keeping the planting area as weed-free as possible make it a lot easier to control pests and avoid plant diseases. Zinnia varieties that grow more than 24 inches (60) cm) tall require 18 inches (45 cm) between plants. Plan out the areas you want your zinnias to grow in, since digging up … Planting the entire pot reduces the transplant shock so the zinnia will have a greater chance of becoming established. While growing zinnia plants, remember to space them correctly. Growing zinnias from seed might be one of the easiest gardening tasks of the year. Zinnia seeds require a sowing depth of 1/4 inch. A sterile, fast-draining potting soil containing vermiculite or perlite is best for zinnia seedlings. Plant zinnias in spring, after the last frost has passed and the soil is warm. Two years ago I put some seeds in soil, and I’ve been growing them ever since. Look for dwarf zinnias, as regular varieties can become top-heavy and may tip over. Learn how to sow zinnia seeds indoors by following our four simple steps, below. Starting zinnia seeds indoors in the spring, four to five weeks prior to the last average spring frost date, will produce starts mature enough for transplanting outdoors. Zinnias may be started indoors or directly in the garden. Harden off and plant out 30cm apart when all risk of frost has passed. Zinnia seeds should germinate within 10 to 21 days. "Whether seeding directly in beds or germination trays, zinnia seeds should be sown to a depth of a quarter of an inch into deep, loamy soil," she says. Starting Seeds Indoors . Placing the pots away from heating and cooling vents will reduce temperature fluctuation and soil moisture loss. Starting annuals indoors is much like starting vegetables from seed. When you fill the pots, the soil level should sit 1 to 1 1/2 inches below the top to allow room for watering. Plan out the areas you want your zinnias to grow in, since digging up and moving the plants later will likely be unsuccessful. Planting: Zinnia is extremely easy to start from seed. When planting out your zinnias, choose a site for them that is sunny and sheltered, and plant them in well-drained soil.Â, When planting out your zinnias, choose a site for them that is sunny and sheltered, and plant them in well-drained soil.Â.