🐻 Alaska Bearberry

What it looks like

Alaska is bearberry at its northernmost: a low, prostrate, evergreen mat of small, leathery, glossy, dark green leaves on trailing stems, staying well under a foot tall and spreading several feet wide over time, with the bronze-red winter foliage color that cold brings out in bearberry leaves. Spring brings small pinkish-white urn flowers, and late summer brings bright red berries that persist into winter — against snow, the red-on-green contrast is the plant’s best look, and in the coldest gardens it gets the longest snow season to show it off.

Photographs on this page show the species, Arctostaphylos uva-ursi, which is what this cultivar looks like in the garden — a low, evergreen, trailing mat — because cultivar-specific photographs verified as this exact selection are not available. Nothing here is a stand-in for a different plant.

Why this variety

Alaska is the selection for the coldest gardens where bearberry is most at home. The species guide lists it as a northern selection, as the name suggests, for the coldest gardens — and bearberry’s wild range runs to the Arctic, so a northern selection is not a marketing label, it is a plant selected from the part of the range where winters are longest and hardest. If you garden in the far north, where other groundcovers heave, desiccate, or simply give up, Alaska is the bearberry selected for your conditions. In milder climates it grows like any bearberry; in cold ones it is the one with the home-field advantage.

Florida honesty, up front: bearberry is not a Florida plant for most of the state. It grows poorly in hot, humid summers and is not recommended for planting south of zone 7, and no cultivar on this page changes that — a coastal selection’s heat tolerance means California-coast heat, not humid subtropical heat. If you garden in Florida, read this guide for admiration, for northern friends, and for understanding the plant when it shows up in butterfly guides as a host plant — not as a planting plan for your own yard. Northern gardeners, this one is yours.

How to grow

Alaska grows like the species, with cold as its comfort zone. Plant it in full sun to part shade in acidic, gritty, well-drained soil, space plants about 18 inches apart, water to establish, then back off. Its cold hardiness is the point — bearberry as a species is hardy roughly in zones 2 to 6, and a northern selection sits at the cold end of that range with confidence — but its other needs do not change with latitude: sharp drainage still matters more than cold protection, lean soil still beats rich soil, and fertilizer still does more harm than good.

Plant in full sun to part shade in acidic, dry to medium, well-drained, sandy or gritty soil — bearberry genuinely prefers lean ground, and that preference is the whole growing strategy. Space plants about 18 inches apart for a groundcover that knits together over a few seasons; each plant spreads several feet wide over time, so do not plant them like bedding annuals or you will be digging out extras in year three. Water to establish in the first season, then back off: bearberry is drought-tolerant once established and likes exposed, open sites with good air movement. Buy nursery plants rather than starting from seed — seed has a hard coat, needs scarification plus cold stratification, and germinates slowly and unevenly — and propagate your own plants by layering: trailing stems root at the nodes where they touch soil, so pin a stem down, wait for roots, and sever it as a new plant, or take semi-hardwood cuttings in late summer.

Water & feeding

Water to establish, then drought-tolerant. Bearberry wants dry to medium soil moisture and sharp drainage above all; wet feet in winter rot it faster than cold ever will. If your soil holds water, plant on a slope, a berm, or a raised bed of gritty, sandy mix, and mulch with gravel or pine needles rather than heavy bark that stays soggy. Do not fertilize. This cannot be said too often for a plant whose entire strategy is thriving on starvation rations: fertilizer produces soft, leggy growth that is more vulnerable to winter damage and disease, and it is the single most common way gardeners kill a plant that would otherwise outlive them. On acidity: bearberry is a heath-family plant, Ericaceae, and like its relatives it prefers acidic soil. If your soil is alkaline, bearberry will chlorose — yellow leaves, weak growth — and no amount of watering fixes a pH problem. Test first; if your soil is strongly alkaline, grow it in a container of acidic mix or choose a different groundcover. Mycorrhizal fungi in the soil help bearberry take up nutrients from poor ground, which is another reason not to disturb an established mat or drench it with fungicides.

Common problems

• Hot, humid summers — the deal-breaker for southern gardeners. Bearberry grows poorly in hot, humid summer climates and is not recommended south of zone 7. Do not try to force it; plant a warm-climate groundcover instead.
• Wet soil and crown rot — poor drainage kills bearberry faster than cold. Plant on slopes or gritty, raised soil, and never let water sit on the crown in winter.
• Alkaline soil chlorosis — yellow leaves on a bearberry in limy soil mean the pH is wrong, not that the plant needs fertilizer. Test the soil and acidify or relocate.
• Fertilizer damage — fertilizing produces soft growth and winter kill. Leave the fertilizer bag in the shed.
• Slow establishment — bearberry is slow-growing, especially from seed. A first-year plant looks like almost nothing. Judge it in year three, when the mat starts to knit together.
• Leaf gall and fungal spots — bearberry can suffer leaf spot fungi and a distinctive leaf gall in wet seasons. Cold-climate plantings still get wet-season leaf spot and gall; air movement and sun are the prevention. Good air movement, sun, and avoiding overhead watering reduce pressure; remove badly affected stems rather than spraying a wildlife groundcover.
• Mealy berries, disappointed humans — the berries are edible but dry and mealy and not tasty raw. They are wildlife food first. If you want to use them, cook or process them, and note that large doses of the leaves’ arbutin content have been reported to cause nausea and other effects — this is a plant to admire and to leave mostly to the bears.

Harvest

Alaska’s berries ripen in late summer, turn bright red, and persist into winter — and in the far north, where winter is long and other food is buried under snow, that persistence matters more than anywhere else. Birds and small mammals eat them through the cold months, so leave most of them for wildlife, and if you harvest a share, cook or process the berries rather than eating them raw: they are dry and mealy fresh, and their value is as wildlife food and winter color, not as a snack.

The best bearberry harvest is visual: a mat of glossy evergreen leaves, pink bells in spring, and red berries against snow, year after year, with no work from you at all. The leaves have a long traditional history, but they contain arbutin, and large doses have been associated with nausea and other adverse effects, so leaf harvest is not something this guide recommends as a casual project.

Saving seeds

Alaska is a northern selection, so seed saved from it won’t come true — propagate it from cuttings or layering instead. The Saving seeds section of the Bearberry guide covers seed for the straight species.