flower-snapdragon-antirrhinum

Best Soil For Snapdragons

Snapdragons are some of the most popular ornamental plants in the world, appreciated for their vibrant colors and tall, elegant spikes of flowers.

These plants are particularly cultivated for their unique flower heads, which resemble the jaws of a dragon that open and close when squeezed from either side.

With over 30 species of snapdragons and countless hybrids, these plants come in a variety of sizes, shapes, and colors, providing gardeners with an abundance of choices, including white, yellow, orange, pink, and purple.

The plant, formally known as Antirrhinum majus, is native to the Mediterranean region but has been cultivated globally for ornamental purposes. They are considered a perennial plant in some regions, but many gardeners treat them as an annual.

Relatively easy to grow, their blooms bring color and life to any garden. However, for gardeners to achieve optimal results, it is essential to know how to keep snapdragons blooming, when to prune, when to pinch, and when to deadhead.

In this article, we’ll dive into the world of snapdragons and explore the best ways to grow, care for, and enjoy these beautiful plants.

Table of Contents

What's The Best Soil To Grow Snapdragons?

Snapdragons prefer well-draining soil that is rich in organic matter. The ideal pH range for snapdragons is between 6.0 and 7.0.

The soil should be moist but not soggy, as snapdragons do not tolerate waterlogged conditions. To ensure proper soil drainage, add sand, vermiculite, or perlite to the soil.

You can also work compost or other organic matter into the soil to provide essential nutrients to the plants.

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When to Plant Snapdragons

The best time to plant snapdragons is in early spring or fall. Snapdragons are cool-season plants that thrive in temperatures between 55°F and 80°F. Planting snapdragons in late spring or summer can cause them to wilt and die due to the heat and humidity.

Where to Plant Snapdragons

Snapdragons grow best in areas that receive full sun or partial shade. They prefer cooler temperatures and cannot tolerate extreme heat or cold. Snapdragons can be grown in containers, hanging baskets, or garden beds. When planting snapdragons in containers or hanging baskets, use well-draining soil and make sure the containers have drainage holes to prevent waterlogging.

How to Plant Snapdragons

To plant snapdragons, start by preparing the soil by removing weeds and debris and working compost or other organic matter into the soil. Dig a hole that is twice the size of the root ball of the plant and gently loosen the roots before planting. Place the plant in the hole and backfill with soil, making sure the top of the root ball is level with the soil surface. Water the plant thoroughly after planting and add a layer of mulch around the base of the plant to retain moisture and suppress weeds.

How to Grow Snapdragons

Snapdragons grow best in cool temperatures, so maintaining a consistent temperature between 55°F and 80°F is key to their growth. Water snapdragons regularly, but be careful not to overwater, as this can cause the roots to rot. Fertilize snapdragons every two weeks with a balanced fertilizer to encourage healthy growth. Deadhead snapdragons regularly to promote continuous blooming.

How to Care for Snapdragons

To care for snapdragons, it’s important to keep the soil moist but not waterlogged. In hot and dry weather, water more frequently to prevent the plants from wilting. Remove any dead or yellow leaves as they appear, and fertilize the plants every two weeks to keep them healthy and strong. Snapdragons may need staking to support their tall stems and prevent them from falling over.

How Much Sun Do Snapdragons Need?

Snapdragons prefer full sun to partial shade. They can tolerate some shade, but too much shade can cause them to grow tall and spindly. In areas that receive particularly hot and dry weather, snapdragons may benefit from partial shade to prevent wilting.

How Often to Water Snapdragons

Snapdragons should be watered regularly, but not too frequently. They prefer evenly moist soil that is not waterlogged. In hot and dry weather, water snapdragons more frequently to prevent the plants from wilting. Be careful not to overwater, as this can cause the roots to rot.

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How Tall Do Snapdragons Get?

Snapdragons can reach up to 3 feet tall in ideal growing conditions. However, the height of snapdragons can vary depending on the species and cultivar. Dwarf varieties may only grow to 6-8 inches tall, while some tall varieties can reach up to 5 feet in height.

How Long Do Snapdragons Last?

Snapdragons are annual or biennial plants, meaning they have a lifespan of one or two years. Depending on the growing conditions, snapdragons can bloom for several weeks to several months.

When Do Snapdragons Bloom?

Snapdragons typically bloom in the spring and fall, but with proper care and maintenance, they can bloom throughout the summer months as well. Blooming times can vary depending on the species and cultivar.

How Long Do Snapdragons Bloom?

The length of time snapdragons bloom can vary depending on the species and cultivar. Blooms typically last for several weeks to several months.

How to Keep Snapdragons Blooming?

Snapdragons bloom profusely from mid-spring to early fall, and for gardeners to keep their snapdragons blooming, they need to keep the plant healthy. The secret to promoting healthy growth and abundant blooms lies in maintaining optimal growing conditions. Here are a few tips that can help improve the growing conditions:

Soil – Snapdragons require well-draining soil. Plant them in soil that has been enriched with compost and other organic matter. The addition of organic matter ensures that the soil stays moist while complementing the plant’s nutrient needs.

Watering – Water plants regularly, ensuring the soil remains evenly moist. Regular watering prevents the plant from drying out and helps ensure continuous blooming.

Fertilizer – Snapdragons benefit from fertilizer throughout their growing phase. Apply balanced fertilizer at least once a month to help promote strong stems, healthy foliage, and abundant, continuous blooms.

Sunlight – Snapdragons grow best in full sun or partial shade. The plant needs at least six hours of sunlight per day to thrive.

How to Prune Snapdragons

Pruning snapdragons is essential to maintain healthy growth and promote continuous blooming. Pruning can help promote healthy foliage growth, prevent disease, and encourage new stem growth. Pruning snapdragons primarily serves two purposes.

The first is to remove any dead, diseased, or damaged foliage and blooms. Cutting away these parts reduces the spread of disease, and it also allows for fresh and healthy blooms to replace the damaged ones.

The second purpose of pruning is to encourage new growth. Snapdragons grow best when they have a chance to regrow after pruning.

Regular pruning stimulates branching, resulting in more blooms and a fuller plant. Deadheading is one of the most critical pruning techniques when it comes to snapdragons.

When to Pinch Snapdragons


Pinching is another pruning technique that can help keep snapdragons blooming and produce fuller plants.

Pinching involves removing the tips of new stems to encourage branching. After the plant has grown to at least six inches tall, gardeners can pinch or cut off the tips of the stems from the central stem.

The goal is to encourage the side stems to start growing, making the plant fuller and producing more blooms.

When to Deadhead Snapdragons


Deadheading is a process of removing dead or faded flowers from the plant. This process helps keep the snapdragon looking neat and tidy while encouraging new flower growth.

Deadheading can help stimulate the plant to produce more blooms, ensuring that it remains vibrant and colorful throughout the growing season.

To deadhead snapdragons, use your fingers or a pair of scissors to remove the blossom from the stem. Snapdragons often set seed after their blooms fade, so gardeners may leave some blossoms untouched to propagate future growth.

Snapdragons are a beautiful addition to any garden bed. But to keep them looking their best, gardeners need to pay close attention to pruning, pinching, deadheading, and providing the plant with essential growing conditions. With proper care, you can enjoy snapdragons’ clustered flowers and vibrant colors throughout the growing season.

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Common Problems When Growing Snapdragon Plants

While snapdragon plants are relatively easy to grow, there are some common problems that gardeners may encounter. Lets take a closer look at these issues and explore some potential solutions.

1. Poor or Inconsistent Germination

One of the most common problems with snapdragon plants is poor or inconsistent germination. This can be caused by a number of factors, including improper temperature, lack of moisture, or poor soil. To ensure consistent germination, it’s important to start snapdragon seeds indoors or in a greenhouse about 8-10 weeks before the last expected frost. This will give the seeds enough time to sprout and establish roots before being transplanted outdoors.

To improve germination rates, gardeners can also take steps to ensure proper soil moisture and temperature. Soil should be kept moist but not waterlogged, and the temperature should be kept between 65-70 degrees Fahrenheit. Additionally, adding a layer of mulch to the soil can help maintain moisture and keep the soil at a consistent temperature.

2. Pests & Diseases

Snapdragon plants are susceptible to a number of pests and diseases, including aphids, spider mites, and rust. Pests can weaken or damage the plants, while diseases can cause wilting, yellowing, or death.

To prevent pest and disease problems, gardeners should practice good sanitation, including removing any dead or infected plant material, and keeping the plants well-watered and fertilized. Many pests can be controlled using natural methods, such as introducing beneficial insects like ladybugs or lacewings, or using organic insecticides.

3. Wilting or Drooping

Wilting or drooping can be a common problem with snapdragon plants, especially if the soil is too dry or if the plants are in direct sunlight for too long. To prevent wilting, gardeners should ensure that the soil is moist and that the plants are not getting too much direct sunlight. A layer of mulch can help retain moisture in the soil, while positioning the plants in a partially shaded area can protect them from direct sunlight.

4. Lack of Blooms

If snapdragon plants fail to produce blooms, it could be due to a lack of sunlight or nutrients. These plants require at least six hours of direct sunlight per day to produce blooms, so it’s important to position them in a location where they will receive adequate light. Snapdragons require regular fertilization, typically every 4-6 weeks, to ensure healthy growth and blooms.

5. Overcrowding

Overcrowding can be a common problem with snapdragon plants, especially if they are planted too close together or in a container that is too small. Overcrowding can make it difficult for plants to receive adequate nutrients and sunlight, which can lead to stunted growth, reduced blooms, and pest and disease problems.

To prevent overcrowding, it’s important to space snapdragons appropriately, typically about 12-18 inches apart, and to use a container that is large enough to accommodate the plant’s root system. If plants become overcrowded, gardeners may need to separate them or transplant them to a larger container or outdoor space.

While snapdragon plants are relatively easy to grow, they are not immune to common problems like poor germination, pest and disease issues, wilting, lack of blooms, and overcrowding. Gardeners can take steps to prevent and address these problems, including starting seeds indoors, practicing good sanitation, ensuring proper soil moisture and lighting conditions, fertilizing regularly, and spacing plants appropriately. By following these tips, gardeners can enjoy the vibrant blooms and colors of snapdragon plants in their outdoor spaces.

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