How To Grow Tall Zinnias

Zinnias are a type of flowering plant that are native to Mexico and Central America. They are a popular choice for gardeners due to their bright, vibrant colors and easy-to-care-for nature. With a little bit of knowledge and care, you can grow beautiful zinnias in your own garden. In this article, we'll provide tips for growing and caring for zinnia plants to ensure they thrive in your backyard.

Choosing the Right Location for Your Zinnias

Zinnias grow best in full sunlight, so it's important to choose a location in your garden that receives at least 6-8 hours of direct sunlight each day. They also prefer well-draining soil, so be sure to choose a spot that has good drainage. If your soil is heavy and doesn't drain well, consider adding sand or compost to improve the soil structure.

Preparing the Soil for Zinnias

Before planting your zinnias, prepare the soil by removing any weeds or debris from the area. Using a garden fork or spade, loosen the soil to a depth of at least 12 inches. Mix in a good-quality compost or organic matter to add nutrients and improve the soil's structure. Zinnias prefer a slightly acidic soil with a pH between 5.5 and 7.5, so adjust the pH if necessary.

Planting Zinnias

Zinnias can be started from seed or purchased as seedlings from a nursery or garden center. If starting from seed, sow the seeds directly into the prepared soil after the last frost date in your area. Plant the seeds 1/4 inch deep and space them 6-18 inches apart, depending on the variety. Water the seeds well and keep the soil moist until the seedlings emerge. If you're planting seedlings, be sure to space them out according to the variety's requirements. Dig a hole that's slightly larger than the seedling's root ball and gently remove the plant from its container. Place the plant in the hole and backfill with soil, pressing down gently to remove any air pockets. Water well and keep the soil moist until the plant becomes established.

Caring for Zinnias

Zinnias are relatively low-maintenance plants, but they do require regular watering and fertilization to stay healthy and vibrant. Water your zinnias deeply once a week, soaking the soil to a depth of at least 6 inches. If your area receives consistent rainfall, you may not need to water as frequently. Fertilize your zinnias every 4-6 weeks with a balanced fertilizer, such as a 10-10-10 or 20-20-20 formula. Be sure to follow the manufacturer's instructions when applying the fertilizer. If your zinnias begin to look crowded or overgrown, thin them out by removing some of the stems at their base. This will allow for better air circulation and prevent disease. Zinnias are also susceptible to powdery mildew, which appears as a white, powdery coating on the leaves. To prevent powdery mildew, water your zinnias at the base of the plant and avoid getting water on the leaves. If you do notice powdery mildew on your zinnias, treat them with a fungicide according to the manufacturer's instructions.


Zinnias are a beautiful and easy-to-care-for addition to any garden. By choosing the right location, preparing the soil, planting correctly, and caring for your zinnias, you can enjoy vibrant and colorful blooms all season long. With these tips, you'll be on your way to growing healthy and beautiful zinnias in your own backyard.

Giant Double Mix Zinnias

Additional Tips for Growing Zinnias

- Deadhead your zinnias regularly to encourage more blooms
- Pinch back the stems of your zinnias when they're about 6 inches tall to encourage bushier growth
- Zinnias attract butterflies and other pollinators, making them a great choice for a pollinator garden
- If you live in a hot climate, plant your zinnias in a location that receives some afternoon shade to prevent them from overheating
- Zinnias make great cut flowers and will last up to a week in a vase if you change the water and re-cut the stems every couple of days

Purple Zinnias

By following these tips and caring for your zinnias, you'll be rewarded with beautiful and vibrant blooms all season long. Whether planted in garden beds or containers, zinnias are a great way to add color and life to your outdoor space.

Red Zinnias

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