Geum (Geum), commonly called avens, is a cheerful, hard-working perennial that bridges the gap between spring and summer with weeks of warm-toned flowers in fiery orange, scarlet, gold, and apricot. Held on slender, wiry stems above neat rosettes of scalloped, semi-evergreen foliage, the blooms — single, semi-double, or fully double depending on the variety — dance well above the leaves and pair beautifully with tulips, alliums, and early perennials. Modern cultivars like ‘Totally Tangerine,’ ‘Mrs. J. Bradshaw,’ and ‘Lady Stratheden’ have made geums a border favorite for their long bloom, tidy habit, and ability to light up the front of a bed in late spring. This guide covers hardiness zones, the sun and well-drained soil geums need, planting and spacing, watering, deadheading for the longest possible show, dividing to keep clumps vigorous, and the handful of problems — mainly soggy soil and tired clumps — to avoid.
Key Takeaways
- Zones: Most geums are hardy in USDA zones 5–8 (some 4–9); a clump-forming, semi-evergreen perennial.
- Light: Full sun to part shade — full sun in cool climates, light afternoon shade where summers are hot.
- Soil & water: Wants moist but well-drained, fertile soil; good drainage is essential, as it rots in wet winter ground.
- Bloom: Late spring into early summer, with sporadic rebloom into fall if regularly deadheaded.
- Key task: Deadhead spent flowers and divide clumps every 2–3 years to keep plants vigorous and long-blooming.
Hardiness and Size
Most garden geums are hardy in USDA zones 5 through 8, with some species and cultivars stretching to zone 4 on the cold end or zone 9 in cooler-summer regions. They are clump-forming herbaceous perennials, and in milder climates the basal foliage stays semi-evergreen through winter, giving you a green presence even in the off-season. They grow from a crown of fibrous roots, expanding steadily into tidy mounds that are easy to fit into a mixed border.
Geums are modestly sized, which makes them ideal for the front or middle of a bed. The foliage rosettes typically sit six to twelve inches tall, while the airy flower stems rise to about one and a half to two and a half feet, depending on the variety. ‘Totally Tangerine’ is among the tallest and most floriferous, sending up a long succession of soft-orange single blooms on tall stems; ‘Mrs. J. Bradshaw’ offers semi-double scarlet flowers; and ‘Lady Stratheden’ brings rich golden-yellow doubles. Most clumps spread to about one to one and a half feet wide over a couple of seasons.
Light and Soil
Geum flowers best in full sun, which produces the most blooms and the sturdiest stems. In regions with cool summers, give it all the sun you can. Where summers are hot and dry, however, geum appreciates light afternoon shade, which keeps the plant from overheating and prolongs both the foliage and the flowering — full, baking sun in the South can stress it. Aim for a minimum of four to six hours of sun for a good show; in too much shade, plants grow leggy and flower poorly.
Soil is where geums are most particular: they want moist but genuinely well-drained, fertile ground, and good drainage is non-negotiable. While they like consistent moisture during the growing season, they will not tolerate soil that stays cold and waterlogged over winter — wet feet in the dormant season is the most common cause of geum death, leading to crown rot. Dig in plenty of compost at planting to improve both fertility and drainage, and on heavy clay, plant on a slight mound or amend generously with grit and organic matter. Geums prefer a neutral to slightly acidic or slightly alkaline pH and adapt to a broad range as long as drainage is good.
Planting
Plant geum in spring after the last frost or in early fall, giving the roots time to establish before the stress of summer heat or winter cold. Choose a sunny, well-drained site with the fertile soil described above. Dig a hole as deep as the root ball and about twice as wide, work compost into the backfill, set the crown right at soil level (planting too deep invites rot), firm gently, and water in thoroughly.
Space plants about twelve to eighteen inches apart so the clumps have room to fill out and air can circulate around the foliage — good airflow helps prevent the fungal leaf problems geums occasionally get in damp, crowded conditions. Geums look wonderful planted in groups of three or five toward the front of a border, where their warm colors weave among other late-spring bloomers. Mulch lightly with two to three inches of organic mulch to conserve moisture and suppress weeds, but keep it well off the crown to avoid trapping moisture against it. Water newly planted geums regularly through their first season. They make excellent companions for tulips, alliums, hardy geraniums, and catmint; find more border partners in our Plants & Flowers hub.
Watering and Feeding
Geums like steady moisture during the growing season, particularly while they are flowering and during dry, hot spells. Keep the soil evenly moist — but never waterlogged — and water deeply once or twice a week in the absence of rain, especially for first-year plants. The balance to strike is consistent growing-season moisture combined with sharp drainage so the crown never sits in cold, wet soil. Mulch helps hold moisture between waterings. Once established, geums tolerate brief dry spells but flower and look best when not allowed to dry out completely.
Geums are light-to-moderate feeders. An annual spring application of compost or a balanced slow-release fertilizer as growth resumes supports strong flowering. A second light feeding after the main bloom flush can encourage rebloom. Avoid overfeeding with high-nitrogen fertilizer, which pushes leafy growth at the expense of flowers and can make stems floppy. In reasonably good soil, a yearly compost topdressing and refreshed mulch are usually all the feeding a geum needs.
Deadheading for a Long Bloom
The secret to a long geum season is diligent deadheading. The main flush of bloom comes in late spring into early summer, but many cultivars — especially the long-blooming hybrids like ‘Totally Tangerine’ — will keep throwing up sporadic flowers into fall if you remove spent blooms before they set seed. Snip or pinch off faded flowers and their stems back to a healthy leaf or bud regularly through the season. This redirects the plant’s energy from seed production back into making more flowers, dramatically extending the display and keeping the plant looking tidy.
When the whole main flush has finished and the flower stems look tired, you can shear the spent stems back to the basal foliage to neaten the plant and sometimes prompt a fresh round of growth and bloom. Removing seed heads also limits self-seeding — worth noting because seedlings from named hybrids rarely resemble the parent. Tidying the semi-evergreen foliage of any winter-damaged leaves in early spring keeps the rosette looking fresh as new growth begins.
Dividing and Propagation
Geums tend to lose vigor and flower less as their clumps age and the centers become woody, so dividing every two to three years is the key to keeping them blooming freely — and it is the most reliable way to propagate named cultivars true to type. The best time to divide is early spring as growth begins, or in early fall after flowering. Dig up the whole clump, and use a sharp knife or spade to split it into sections, each with healthy roots and a portion of the crown with several growth points, discarding any old, woody central material.
Replant the divisions promptly at the same depth — crown at soil level — water in well, and keep them moist while they re-establish. Beyond division, species geums can be grown from seed (though hybrids will not come true), and many naturally self-sow if seed heads are left in place. Regular division every few years is the single most important thing you can do to keep older geum clumps healthy and productive rather than letting them dwindle. For more on rejuvenating perennials by division, see our guide to growing Japanese anemones.
Seasonal Care and Overwintering
Through the season, geum care is straightforward: water during dry spells, feed lightly, deadhead consistently, and divide every couple of years. The semi-evergreen rosettes mean the plant rarely disappears entirely, so it contributes some structure even out of bloom. In early spring, tidy away any tattered or winter-burned leaves to make way for fresh growth and the coming flowers.
As a hardy perennial, established geum overwinters reliably within its zones and needs little special protection. The most important winter factor is drainage: a geum in well-drained soil sails through winter, while one sitting in cold, soggy ground is prone to crown rot. In the coldest zones, a light mulch over the crown after the ground freezes helps protect newly planted geums and recent divisions, but avoid heavy, wet mulch piled against the semi-evergreen rosette, which can encourage rot. Plants return and resume growth early in spring, often greening up before many neighbors.
Common Problems and Pests
Crown rot and winter death. The most common way to lose a geum is wet, poorly drained soil in winter. Plant in well-drained ground, amend heavy clay with grit and compost, set the crown at soil level, and avoid piling wet mulch against the base.
Declining vigor and fewer flowers. Aging clumps with woody centers flower poorly. Divide every two to three years in spring or fall, replanting only the healthy outer sections, to keep plants blooming freely.
Powdery mildew and leaf spot. Fungal issues can appear on crowded plants in humid, damp conditions. Space plants for airflow, water at the base rather than overhead, and remove affected foliage to improve circulation.
Poor flowering or leggy growth. Usually too much shade, overfeeding with nitrogen, or simply an old clump in need of division. Give it more sun, ease off fertilizer, deadhead, and divide if the clump is tired.
Pests. Geums are largely pest-free, but watch for sawfly larvae or caterpillars chewing leaves in spring and the occasional aphid. Hand-pick or hose off light infestations; serious damage is rare, and deer tend to leave geums alone.
Frequently Asked Questions
How long do geums bloom?
The main flush comes in late spring into early summer, but with regular deadheading many cultivars — especially hybrids like ‘Totally Tangerine’ — rebloom sporadically through summer and into fall. Removing spent flowers before they set seed is the key to a long season.
Why is my geum not flowering well?
The most common causes are an old, woody clump that needs dividing, too much shade, or overfeeding with nitrogen. Divide tired clumps every two to three years, give the plant at least four to six hours of sun, and feed lightly rather than heavily.
What kind of soil do geums need?
Moist but well-drained, fertile soil. Good drainage is essential, since geums rot in cold, waterlogged winter ground. Amend heavy clay with compost and grit, plant the crown at soil level, and never let the dormant plant sit in soggy soil.
Do geums need full sun?
They bloom best in full sun in cool climates. Where summers are hot, give them light afternoon shade to prevent stress and extend flowering. Aim for at least four to six hours of sun; deep shade leads to leggy growth and few flowers.
How often should I divide geum?
Every two to three years, in early spring or early fall. Geums lose vigor as their clumps age and centers go woody, so dividing rejuvenates them, keeps them blooming freely, and gives you new plants true to the parent cultivar.