Plant Zinnias

Zinnias are colorful flowers that bloom in the summer months. If you're interesting in gardening as a hobby, zinnias are a fun addition to any garden. You can grow zinnias in your own backyard after the last frost date. Zinnias thrive in a sunny location, so choose an area without a lot of shade. Zinnias do best in dryer dirt and benefit from occasional watering and trimming. With a little time and effort, you will have a beautiful garden of zinnias to enjoy over the summer.

Steps

Establishing the Basics

  1. Check your local frost dates. You can look local frost dates up online. Frost dates are the dates where frost can be expected overnight or in the morning. The Farmer's Almanac online can help you find your frost date by entering your zip code.[1] It's important to plant zinnias after the last frost date. Zinnia seeds will not survive if they're exposed to frost.[2]
    • It's a good idea to wait a few days or a few weeks after the last predicted frost date. Weather is unpredictable and there's always a chance the forecast could be wrong.
  2. Find a sunny location. Zinnias require a lot of sun to thrive. When planting zinnias, choose an area where they get full exposure to sun. Avoid areas with any shade that could block out the warmth from the sun.[2]
  3. Test your soil. A simple testing kit, which you can buy online or at a local greenhouse, will allow you to test your soil's pH level. For zinnias, the soil's pH should be between 5.5 and 7.5[2] If your soil's pH is out of range, adjust the soil as necessary.
    • Tests vary in terms of use. Usually, you insert the test in the soil for a set period of time, sort of like using a thermometer, and then check the test to see the pH.
  4. Adjust your soil as necessary. If your pH is too high or too low, you can take measures to adjust soil pH. Adding organic materials to your soil, which you can purchase online or at a greenhouse, can later your soil's pH.[3]
    • Limestone is your best option to raise pH levels. Limestone should be added to the top seven inches of your soil.
    • To lower pH levels, opt for acidic materials such as pine needles and peat moss. If you need to lower your soil's pH fast, opt for sulfur.

Planting Your Seeds

  1. Add some sand if the ground is very moist. Zinnias actually thrive with less water. In the event your soil gets moist, pour a small amount of sand into the ground prior to planting to get the soil relatively firm and water-free.[4]
    • For example, if you planned to plant and there was an unexpected rainfall, some sand can be used to improve conditions.
    • However, in the event of a very heavy rainfall, you may want to wait a few days to plant. The soil will be very wet and adding sand may not be enough to dry it out.
  2. Plant zinnia seeds a quarter inch (.6 centimeter) deep. Use your fingers to make small holes in the ground. The holes should be about a quarter of an inch (.6 centimeter) deep for the zinnias to grow safely.[2]
  3. Give them adequate space to grow. Proper spacing is important as overcrowded zinnias may not grow. Small varieties of zinnias should be placed four inches (about 10 centimeters) apart. Larger varieties should be placed two feet (about .6 meter) apart.[4]
    • It's a good idea to bring a measuring tape to ensure proper spacing rather than estimating on your own.

Caring for Your Zinnias

  1. Thin your zinnias when they reach three inches. Zinnias do not require a lot of trimming early on. However, when they reach three inches (about 8 centimeters), their leaves may be growing to the point they're touching and overlapping. At this point, use garden shears to trim any leaves and thin the plants so they're about six to 18 inches (about 15 to 46 centimeters) apart.[5]
  2. Water your zinnias lightly. Before they begin to grow, water your zinnias daily. After they've become established, however, zinnias do not need a lot of watering. You can get by watering your zinnias once every three days.[6]
  3. Fertilize your zinnias every other week. Purchase a water soluble fertilizer online or from a local greenhouse. Work the fertilizer into the ground surrounding the zinnias every other week to promote growth.[6]
    • Review your fertilizer's package for precise instructions on use. The package should indicate how much fertilizer should be used depending on the size of your garden.
  4. Minimize the risk of mildew. Zinnias are not susceptible to a lot of pests, but may become infected with mildew. Take measures to protect your zinnias from mildew. To prevent mildew, do not overwater zinnias. When you do water zinnias, water them at soil level. Make sure to trim your zinnias regularly to prevent overcrowding.[7]

Source and Citations

  1. ↑ http://www.almanac.com/gardening/frostdates/MI/Hancock
  2. ↑ 2.0 2.1 2.2 2.3 http://www.almanac.com/plant/zinnias
  3. ↑ http://vric.ucdavis.edu/pdf/Soil/ChangingpHinSoil.pdf
  4. ↑ 4.0 4.1 https://www.hunker.com/12188778/how-to-plant-zinnia-seeds
  5. ↑ https://www.rodalesorganiclife.com/garden/zinnia/slide/1
  6. ↑ 6.0 6.1 http://www.denverpost.com/2008/05/23/zinnias-can-take-the-heat-and-drought/
  7. ↑ http://www.burpee.com/gardenadvicecenter/annuals/zinnias/all-about-zinnias/article10019.html

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