![]() Your zinnias can last well into the fall if you protect them from frost on cold fall nights. If planting the seeds outside, the soil needs to be around 23 degrees Celsius (75 degrees Fahrenheit).īeing heat lovers, Zinnias do not tolerate frost, so be sure to wait until after the last frost, and be prepared to cover them if a surprise frost comes along, especially at the end of the season. Using grow lights helps keep the soil warm enough to germinate the seeds. ![]() ![]() Zinnias like a warmer soil for germination so be sure to start your seeds in an area that is warmer (not a cold corner of the basement). *Soil temp 23+ degrees Celsius (75 degrees Fahrenheit). This ensures the maximum amount of enjoyment! Here in zone 4, we start our seeds indoors 5 weeks before the last frost date and then start the process of hardening them off after the last frost date. In order to make the most of the gardening season, Zinnias need to be started after the last frost date. Here are some tips for growing zinnias from seed. ![]() Starting zinnias from seed is the most economical way to grow a large amount of flowers for mass plantings in your garden. Shop our selection of unique and trending Zinnia seeds - Queen Lime Red or Queen Lime Orange. Zinnias provide playful pops of color to your garden and can provide blooms for most of the season. Zinnias are a popular addition to the garden and very easy to grow from seed, germinating quickly and profusely, they are perfect for the impatient gardener. ![]()
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