Rhododendron lapponicum aka Lapland Rhododendron

Rhododendron lapponicum, or Lapland rosebay, is an evergreen shrub in the heath family, Ericaceae. Kew places its native range from southern and eastern Siberia to Japan. Plants For A Future gives a wider range across northern Asia, Europe, and North America. These sources differ on the extent of its range. It is not native to Britain or Ireland. It grows in cold subalpine or subarctic regions. Its habitats include rocky barrens and woods below the alpine zone.

Plants For A Future gives a garden height of about 3.3 feet [1 metre]. It gives the same width, making this a small shrub. Kew describes its form as a shrub or subshrub. It keeps its leaves through winter. Flowers appear from April to May, according to Plants For A Future. Each flower has both male and female organs. Insects pollinate the flowers. The supplied species evidence does not describe flower colour, bark, or fruit.

Grow it in moist, well-drained soil rich in humus. Sandy or loamy soil suits it better than heavy clay. Plants For A Future recommends peat-rich soil or sandy loam. Avoid lime and dry, arid sites. Its stated ideal soil pH is 4.5–5.5. It can grow in sun or light shade. In warmer climates, it needs more shade. Woodland edges and sites with dappled shade offer possible garden settings. Its low size also helps guide placement within a woodland garden.

Its roots grow near the soil surface. Keep weeds and nearby plants from crowding that root zone. Trees with shallow roots can compete with it. Ground covers, herbaceous plants, and heathers can also hinder growth. Plants For A Future reports that it tolerates transplanting well. Seed needs surface sowing, and the compost must stay moist. Young seedlings need greenhouse shelter through their first winter. Other methods include layering in late July and taking half-ripe cuttings in August. Layers may take 15–24 months to root.

Plants For A Future records tea made from leaves and flower tips. That record does not establish that consumption is safe. Its hazard note offers no confirmed toxicity finding for this species. Instead, it raises concerns based on other rhododendrons. The source lists no known medicinal or other uses. It also reports no weed potential.