Znnia flowers are popular annuals native to the United States and originating from the southwest area of the country and some areas of Mexico and Central America. Accustomed to warm climates, zinnias thrive during hot, dry summers. The plants begin producing flowers in early summer and continue all the way until the first frost. Large, colorful blossoms appear in shades of white, yellow, orange, pink and red, depending on the variety. In most cases, zinnias are grown from seed, although bedding plants are sometimes available for purchase in garden centers in early spring.
Hardiness Zones: Zinnia flowers are grown as annuals in all zones in the United States and die back after the first frost of winter. Growing Difficulty: Easy What You Need: Liquid fertilizer How to Grow Zinnia Flowers: Sow zinnia flower seeds directly in the garden or set out transplants in spring about one week after the final frost of winter when temperatures have warmed to at least 50 degrees Fahrenheit. Choose a planting location that receives at least six hours of direct sunlight each day and has fertile, well-drained soil. Space zinnia seeds or plants 4 to 24 inches apart, depending on variety.
Cover seeds with a light layer of soil and water thoroughly to initiate growth. Seedlings will emerge in 5 to 7 days. If you're planting transplants, begin routine care immediately. If growing from seed, wait until germination occurs before proceeding with the following steps. Water drought-tolerant zinnia flowers only as needed, usually about once every two weeks unless temperatures rise above 95 degrees Fahrenheit. In this case, increase the frequency of watering to once per week or more, especially if there is no natural rainfall.
Although they tolerate dry conditions, zinnias prefer soil that's a bit on the moist side, but not soggy. Feed plants once every three to four weeks using a balanced liquid fertilizer at the rate recommended by the manufacturer to promote strong, healthy growth and flower production. Water thoroughly immediately after application to release and distribute the nutrients throughout the soil and to prevent injuring the plant's roots. Pinch the tops of zinnia plants when they are around 4 to 6 inches high to promote a bushier and more compact growth habit. Remove faded zinnia flowers as necessary to encourage further blooming and to conserve nutrients. Trim long stems to improve appearance if desired and stake tall varieties if they begin to grow too tall and flop over.
Tips for Growing Zinnia Flowers: Avoid overhead watering and apply water at soil level early in the day if possible. Zinnia flowers are susceptible to foliar diseases and wet foliage increases the likelihood of disease. Most varieties of zinnia require little pruning and are resistant to pests. If a pest infestation does occur, treat as soon as possible with an organic or chemical repellent or fungicide, depending on the problem.
Landscape Uses: All zinnia flowers make great additions to the garden bed or border, and they're also highly regarded as cut flowers for use in arrangements. Use zinnias in sunny annual beds or as edging plants. They make great companions to other warm- weather annuals and perennials including verbena and portulaca. Common zinnia flowers are sometimes planted in vegetable gardens when they're being used as cut flowers.
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