Sweet Birch

Betula lenta

Native to:
Canada, United States

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Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Betulaceae
Genus:
Betula
Species:
Betula lenta
USDA Symbol:
BELE

Growth Characteristics

Life Cycle:
Perennial
Growth Habit:
Tree
Height:
2400 cm
Light Requirements:
Part Shade,Shade
Drought Tolerance:
Medium
Bloom Months:
apr,may
Bloom Colors:
yellow-green

Wildlife Benefits

Caterpillars:
★★★☆☆ Recorded caterpillar host plant (HOSTS Database)

Keystone Species Ranking

Caterpillar Keystone:
★★★★★ Butterfly & moth species supported by this genus (NWF)

Host Plant for Caterpillars

American lappet moth (Phyllodesma americana), Cameraria lentella, Cecropia moth (Hyalophora cecropia), Coleophora lentella, Confused Morrisonia (Morrisonia confusa), Gypsy moth (Lymantria dispar), Lettered habrosyne (Habrosyne scripta), Morrisonia latex, Peppered Moth (Biston betularia), Pettit's sallow (Pyreferra pettiti), Phyllonorycter martiella, Polia imbrifera, Polyphemus moth (Antheraea polyphemus), Variable Oakleaf Caterpillar Moth (Lochmaeus manteo), White-marked Tussock Moth (Orgyia leucostigma), Compton Tortoiseshell (Nymphalis vau-album), Eastern Tiger Swallowtail (Papilio glaucus), Green Comma (Polygonia faunus), Red-spotted Purple (Basilarchia arthemis)

Garden & Ecology Notes

Wildlife Value:
birds, small mammals, browsed by deer
Fragrant:
Yes
Fall Color:
yellow

Soil Requirements

Soil Type:
rich, well-drained loamy soil
pH:
4.5 - 6.5 (acidic to slightly acidic)
Drainage:
good drainage required
Moisture:
consistently moist
Notes:
prefers cool, moist environments

Propagation & Germination

Stratification:
Cold/moist stratification required — 60–90 days
Germination Time:
14–30 days
Notes:
Seeds require light for germination. Best sown on surface of moist medium at cool temperatures (15-20°C).

The above propagation data sourced from Claude AI

Pre-treatment: Cold-moist stratification for 30 days at 1–5°C (34–41°F).; then Cold-moist stratification for 60 days.

Notes: Seeds require cold stratification before germination.

Source: Claude AI

ORGHPS Germination Guide: Expose to fluctuating outdoor winter temps incl. freezing for 3 months. Increase light/temp in spring.

Source: Ontario Rock Garden & Hardy Plant Society