Geranium is a name that applies to two related but distinct plant groups that are frequently — and forgivably — confused with one another. The true Geraniums, belonging to the genus Geranium in the family Geraniaceae, are hardy perennials native to temperate regions worldwide, commonly called cranesbills for their distinctive, beak-shaped seed pods. The plants most people picture when they say “geranium” — the cheerful, round-headed bloomers spilling from window boxes, patio pots, and summer borders across America — are actually Pelargoniums, a closely related genus also in Geraniaceae, native to South Africa but naturalized in garden culture across every continent. Both groups are covered here, as both are universally referred to as “geraniums” in everyday American gardening language, and together they represent one of the most widely grown, instantly recognizable, and enduringly popular groups of ornamental plants in the world.
The Pelargonium group — the zonal, ivy-leaved, regal, and scented-leaf geraniums — are the workhorses of the American summer garden, flowering with almost relentless generosity from the last frost of spring right through the first hard freeze of autumn. Their blooms come in a brilliant range of reds, hot pinks, salmon, coral, orange, white, and bicolor combinations, and their rounded flower clusters, held above attractively patterned or zoned foliage, have decorated the porches, window boxes, and flower beds of American homes from New England farmhouses to Southern California bungalows for well over a century. The true hardy Geraniums, by contrast, are lower-growing, more delicate in texture, and valued for their starry, five-petaled flowers in cool shades of violet, blue, magenta, white, and soft pink, as well as for their deeply cut, elegant foliage that often turns brilliant shades of red and orange in autumn.
Geraniums — particularly the scented-leaf Pelargoniums — have a long and fascinating history in fragrance, medicine, and culinary arts. The essential oil derived from Pelargonium graveolens (rose-scented geranium) is one of the most widely used ingredients in the global perfume industry, prized as a natural substitute for expensive rose oil and as a fixative that extends the life of floral fragrances. Herbalists and aromatherapists across the United States use geranium essential oil extensively for its reputed calming, antibacterial, and skin-healing properties. In the kitchen, the fragrant leaves of rose, lemon, and mint-scented geraniums are used to flavor cakes, syrups, jellies, and herbal teas — a tradition particularly alive in the farm-to-table culinary communities of Vermont, Oregon, and Northern California.
True hardy Geraniums (Geranium spp.) are among the most ecologically valuable perennials a North American gardener can choose. Species such as Geranium maculatum — the wild cranesbill, native to the woodlands and meadows of the eastern United States from Maine to Georgia — are vital early-season nectar sources for native bees, bumblebees, and several specialist bee species that rely on the Geraniaceae family. Their long flowering season, disease resistance, and tolerance of a wide range of soil and light conditions make them ideal plants for naturalistic and low-maintenance garden styles. Cultivars like ‘Rozanne’ — one of the best-selling perennial plants in American garden history — have introduced a new generation of gardeners to the extraordinary garden value of the true cranesbill Geraniums.
In the floral and horticultural industry, Pelargoniums represent a commercial enterprise of staggering scale. They are consistently among the top-selling bedding plants in the United States each spring, with millions of flats sold through garden centers, big-box home improvement stores, and farmers’ markets from March through May. Wholesale greenhouse operations across Florida, California, and Texas produce Pelargoniums by the tens of millions annually, supplying national retail chains and independent nurseries throughout the country. The introduction of seed-grown series such as the Pinto, Maverick, Orbit, and Caliente series has revolutionized commercial production, allowing large-scale growers to produce uniform, high-performing plants from seed rather than relying exclusively on the traditional — and more labor-intensive — cutting propagation method.
Whether grown as summer annuals in the northern states, as year-round container plants in the mild climates of coastal California and the Gulf Coast, or as beloved houseplants overwintered on sunny windowsills across the Midwest and Northeast, Geraniums hold a uniquely intimate place in American garden culture. They are plants of memory and sentiment — the bright red geranium in grandmother’s window box, the trailing ivy geranium cascading from a hanging basket on a Southern porch, the fragrant rose geranium kept on a kitchen windowsill for its leaves as much as its flowers. Adaptable, generous, fragrant, and spectacularly colorful, Geraniums are a cornerstone of American ornamental gardening that shows absolutely no sign of diminishing in popularity — and for very good reason.
How To Grow And Care For Geraniums
1. Choose the Right Geranium Variety
Geraniums come in many forms, including zonal, ivy, scented, and regal types. Some are grown for their bright flowers, while others are valued for their fragrant leaves. Choosing the right variety helps you match the plant to your garden space, climate, or container needs.
2. Select a Sunny Growing Location
Geraniums thrive in locations that receive plenty of sunlight. Most varieties grow best with at least 6 hours of direct sun each day. Adequate light encourages stronger stems, fuller growth, and continuous flowering throughout the season.
3. Use Well-Draining Soil
These plants prefer fertile, loose, and well-draining soil. Heavy or soggy soil can lead to root rot and poor growth. Mixing compost or organic matter into the soil improves drainage and provides nutrients for healthy development.
4. Plant Geraniums Properly
When planting geraniums in the garden, space them far enough apart to allow good airflow. Place the root ball at the same depth it was growing in its nursery container, then gently firm the soil around the plant.
5. Water Consistently but Carefully
Geraniums like evenly moist soil, especially when actively growing. Water deeply whenever the top layer of soil feels dry, but avoid overwatering. Allowing excess water to drain away helps keep the roots healthy.
6. Fertilize for Better Blooms
Feed geraniums regularly with a balanced liquid fertilizer during the growing season. Fertilizing every few weeks encourages lush foliage and continuous flowering. Avoid overfeeding because it may reduce flower production.
7. Mulch Around Outdoor Plants
Adding mulch around garden geraniums helps retain moisture, regulate soil temperature, and reduce weed growth. Organic mulch such as bark or compost also slowly enriches the soil as it breaks down.
8. Deadhead Spent Flowers
Removing faded flowers encourages the plant to produce new blooms instead of forming seeds. Pinch or cut off old flower stalks regularly to keep the plant tidy and flowering for a longer period.
9. Pinch Back Leggy Growth
Pinching the tips of young stems encourages bushier growth and more branches. This simple practice prevents geraniums from becoming tall and sparse while creating fuller, healthier plants.
10. Protect Geraniums From Extreme Heat
Although geraniums enjoy sunshine, excessive heat can stress the plants. During very hot weather, providing light afternoon shade and consistent watering helps prevent wilting and flower drop.
11. Grow Geraniums in Containers
Geraniums grow exceptionally well in pots and hanging baskets. Containers allow you to move the plants easily and brighten patios, balconies, or windowsills with colorful blooms throughout the season.
12. Watch for Common Pests
Geraniums may occasionally attract pests such as aphids, whiteflies, or spider mites. Inspect the plants regularly and treat infestations early using gentle gardening methods like rinsing leaves or applying insecticidal soap.
13. Prevent Fungal Problems
Good airflow and proper watering help reduce fungal diseases. Water at the base of the plant instead of wetting the leaves, and avoid overcrowding plants in containers or flower beds.
14. Bring Geraniums Indoors in Cold Climates
Geraniums are sensitive to frost. In colder regions, many gardeners move potted geraniums indoors before freezing temperatures arrive. Place them in a bright window and reduce watering during winter.
15. Propagate Geraniums From Cuttings
Geraniums are easy to propagate using stem cuttings. Healthy stems can be rooted in moist potting mix to create new plants. This is a simple and affordable way to multiply your favorite varieties.
16. Enjoy Long-Lasting Color
With proper care, geraniums provide months of colorful blooms and attractive foliage. Their versatility, low-maintenance nature, and ability to grow in gardens or containers make them one of the most popular flowering plants for home gardeners.