Growing Hardy Geraniums: A Comprehensive Guide to Cultivating Resilient Perennials


Hardy geraniums, also known as cranesbills, are versatile and resilient perennials that can thrive in various conditions.

Whether you’re a seasoned gardener or a beginner, this comprehensive guide will provide you with all the information you need to successfully grow hardy geraniums in your garden.

From understanding their preferred growing conditions to learning how to care for them throughout the year, this article will equip you with the knowledge to cultivate beautiful and long-lasting geraniums.

Understanding Hardy Geraniums

Hardy geraniums are herbaceous perennials that come in a wide range of colors, shapes, and sizes. They are known for their delicate flowers and attractive foliage.

Unlike their close relatives, pelargoniums, hardy geraniums are cold-tolerant and can survive freezing temperatures.

They are also deer-resistant, making them a popular choice for gardens in areas with wildlife.

Choosing the Right Location

Hardy geraniums thrive in full sun to partial shade. While they prefer full sun, they can tolerate some shade, making them versatile for various garden settings.

When selecting a location for your geraniums, consider the amount of sunlight the area receives throughout the day.

If you have limited sunlight in your garden, you can still grow geraniums by choosing varieties that are more shade-tolerant.

Soil Preparation and Planting

Before planting hardy geraniums, it’s important to prepare the soil properly. These plants prefer well-draining soil that is rich in organic matter.

Start by removing any weeds or debris from the planting area. Loosen the soil with a garden fork or tiller to improve drainage.

Incorporate compost or well-rotted manure into the soil to enhance its fertility.

Once the soil is prepared, dig a hole slightly larger than the root ball of the geranium and gently place the plant in the hole.

Backfill the hole with soil, firming it gently around the plant.

Watering and Moisture Needs

Proper watering is essential for the health and growth of hardy geraniums. While they are relatively drought-tolerant, they still require regular watering, especially during dry spells.

Water deeply, allowing the water to reach the root zone. Avoid overwatering, as it can lead to root rot.

Monitor the moisture levels in the soil and adjust your watering schedule accordingly. Mulching around the base of the plants can help retain moisture and suppress weed growth.

Fertilizing and Nutrient Requirements

Hardy geraniums are not heavy feeders, but they can benefit from occasional fertilization. Before planting, incorporate a slow-release fertilizer into the soil.

This will provide a steady supply of nutrients throughout the growing season. Alternatively, you can use a balanced liquid fertilizer every four to six weeks during the growing season.

Avoid over-fertilizing, as it can lead to excessive foliage growth at the expense of flowers.

Pruning and Deadheading

Pruning is an important aspect of maintaining the shape and vigor of hardy geraniums.

In late winter or early spring, before new growth emerges, prune back the old stems to encourage new growth. This will also help prevent the plant from becoming leggy.

Deadheading, or removing spent flowers, promotes continuous blooming and prevents the plant from diverting energy into seed production.

Simply pinch off the faded flowers at the base of the stem to encourage new blooms.

Dividing and Propagating Hardy Geraniums

Over time, hardy geraniums can become overcrowded and lose their vigor. Dividing the plants every three to five years helps rejuvenate them and maintain their health.

The best time to divide geraniums is in early spring or early fall when the weather is cool.

Dig up the entire plant and carefully separate the clumps into smaller sections, ensuring each section has roots and shoots. Replant the divisions in prepared soil and water thoroughly.

Geraniums can also be propagated from seeds or by taking stem cuttings.

Dealing with Pests and Diseases

Hardy geraniums are generally resistant to pests and diseases. However, they can occasionally be affected by common garden pests such as aphids, slugs, and snails.

Regularly inspect your plants for any signs of infestation and take appropriate measures to control the pests.

In terms of diseases, geraniums can be susceptible to fungal infections such as powdery mildew and botrytis.

Ensure proper air circulation around the plants and avoid overhead watering to minimize the risk of fungal diseases.

Winter Care and Protection

Hardy geraniums are known for their ability to withstand cold temperatures. Most varieties can tolerate temperatures as low as -20°F (-29°C).

However, providing some winter care and protection can help ensure their survival and promote healthier growth in the following season.

In late fall, after the first frost, cut back the stems to a few inches above the ground.

Apply a layer of mulch around the base of the plants to insulate the roots and protect them from extreme temperature fluctuations.

Additional Tips and Considerations

If you live in an area with deer or other wildlife, consider planting deer-resistant varieties of hardy geraniums.

These varieties have a strong scent or taste that deters animals from feeding on them.

Additionally, if you want to grow geraniums from seed, start them indoors six to eight weeks before the last frost date.

Transplant the seedlings outdoors once the danger of frost has passed. Finally, the best time to plant hardy geraniums is in spring or fall when the weather is mild and the soil is workable.

In conclusion, growing hardy geraniums can be a rewarding experience, adding beauty and color to your garden year after year.

By understanding their preferred growing conditions, providing proper care, and implementing effective maintenance techniques, you can enjoy the resilience and longevity of these stunning perennials.

With the knowledge gained from this comprehensive guide, you are now equipped to successfully cultivate hardy geraniums and create a vibrant and thriving garden.

Frequently Asked Questions

Can geraniums grow in part shade?

Yes, geraniums can grow in part shade. While they prefer full sun, they can tolerate some shade.

If you have areas in your garden that receive partial shade, choose geranium varieties that are more shade-tolerant.

These varieties will still produce beautiful blooms and thrive in less sunlight.

Do deer eat geranium flowers?

Deer generally avoid eating geranium flowers because they have a strong scent and taste that deters them.

However, in areas with high deer populations or during times of food scarcity, deer may nibble on geranium flowers.

To protect your geraniums from deer, consider planting deer-resistant varieties or using deterrents such as fencing or repellents.

When to cut back hardy geraniums?

The best time to cut back hardy geraniums is in late winter or early spring, before new growth emerges. Cut back the old stems to a few inches above the ground using clean and sharp pruners.

This pruning helps rejuvenate the plant, promotes new growth, and maintains its shape and vigor. Avoid cutting back geraniums during the growing season as it may disrupt blooming.

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