Most plants require a dark period to grow, do not leave lights on for 24 hours. How to Grow Zinnias Throughout the Season. Zinnias thrive in a sunny location, so choose an area without a lot of shade. Zinnia tenuifolia ‘Red Spider’ – a compact zinnia, with wide-spaced, spidery petals, growing to a height of 60cm; Zinnia haageana ‘Soleado’ – known as the Mexican zinnia, this species has smaller leaves, making it more tolerant of hot dry conditions and winds.‘Soleado’ bears masses of single orange flowers on strong, stems. Zinnias are annuals, shrubs, and sub-shrubs native primarily to North America, with a few species in South America. This should not be confused with the undersized, smaller flowering ‘state fair mix’. Taller zinnias make great backdrops for flower gardens. Taller varieties sometimes to better with stakes to Taller varieties do well planted in clusters or staked with single stem support stakes. Seeds of zinnia flowers should usually be sown directly into the sunny flower bed, as developing roots do not like to be disturbed. For a longer flowering display, sow the seeds in succession. When the seedlings are 3 inches tall, they are thinned such that they are 6 to 18 inches apart. They typically range in height from 10 to 100 cm tall (4" to 40"). Zinnia seedlings grow in about 4 to 7 days after seeding. Zinnias are fast growing plants. Taking Care of Zinnias. These are quick growers, flowering within a … Bigger plants can grow several feet tall … ), only a few are typically grown in the home garden. This zinnia blooms in shades from lilac to a deep, dark purple, changing shades slightly as it ages. Planting in the Garden: ... Plant zinnias in mixed plantings with other summer-blooming annuals, or place small groups of zinnias among perennials. Of the over 20 species of zinnia (Zinnia spp. The tall variety grows to 4 feet and boasts big 5-6″ blooms. This is done to maximize air circulation. Zinnias are one of the easiest flowers to grow, as they grow quickly and bloom heavily. Thin seedlings to stand 8-24 inches apart, depending on the variety, when they are about 1-2 inches tall. 1-foot tall plants with a mounding habit. Likewise, do zinnias come back every year? : 338– Most species have upright stems but some have a lax habit with spreading stems that mound over the surface of the ground. Description. Great in form, comes in a variety of colors, and absolutely massive when it comes to their size - a good four feet tall (if not taller) with large 3-4” flowers that are absolutely stunning. This is our first year getting the ‘tall’ variety and the difference is astonishing. Growth Habit: Zinnias come in a wide variety of plant sizes. Few bedding flowers produce as many blooms as quickly and easily as zinnias do. Find State Fair Mix Zinnias on eBay Shorter zinnias make great flowers for edging, windowboxes, and other containers. Accordingly, how tall do zinnia flowers get? Growing zinnia plants can be inexpensive, particularly when growing them from seed. Single to fluffy double flowers top "Royal Purple's" tall (36 to 40 inches) plants. There are dwarf varieties 6 to 12 inches tall and wide, and others grow up to 4 feet tall and 1 to 2 feet wide. Top-Performing Zinnia Flowers and Tips for Growing Them . Plant the right variety for your usage and that your space allows. Benary Giant zinnias are the gold standard when it comes to zinnias. You can seed borders or edging areas with smaller, more compact varieties, and these also work well in containers or window boxes. Others are 3-foot tall plants with big flowers. Zinnias do best in … Height/Spread: Varies by type. Tall State Fair Zinnias from Amazon. If you're interested in gardening as a hobby, zinnias are a fun addition to any garden. Some are low-growing. Zinnias can range from being 10 inches tall to 4 feet tall. You can grow zinnias in your own backyard after the last frost date.