It is hardy to zone 4 and is not frost tender. The seeds ripen in October. The flowers are monoecious (individual flowers are either male or female, but both sexes can be found on the same plant) and are pollinated by Wind.
The plant prefers light (sandy) and medium (loamy) soils and can grow in nutritionally poor soil.The plant prefers acid, neutral and basic (alkaline) soils..It cannot grow in the shade.It requires moist soil.The plant can tolerates strong winds but not maritime exposure. (source: pfaf.org)
Genus - Larix
Species - Occidentalis
Common name - Western Larch
Pre-Treatment - Required
Hardiness zones - 3 - 8
Height - 35'-90' / 11 - 27(45) m
Spread - 10'-15' / 3 - 5 m
Plant type - Large Tree
Vegetation type - Deciduous
Exposure - Full Sun
Growth rate - Fast
Soil PH - Acidic, Neutral
Soil type - Clay, Loam, Well Drained
Water requirements - Average Water
Landscape uses - Feature Plant, Screening / Wind Break, Shade Trees
Germination rate - 85
Leaf / Flower color - Green, autumn - yellow / --
|Seed - sow late winter in pots in a cold frame. One months cold stratification helps germination.
STRATIFICATION: Seeds need 30 days pre-chill period. Seeds can be stratified in dampened peat or sand, in a plastic box or bag at 4C or 5C in a refrigerator. The seeds should not be frozen or in a wet medium.
It is best to give the seedlings light shade for the first year. As soon as they are large enough to handle, prick out the seedlings into individual pots. Although only a few centimetres tall, they can be planted out into their permanent positions in the summer providing you give them an effective weed-excluding mulch and preferably some winter protection for their first year. Otherwise grow them on in the cold frame for their first winter and plant them out in early summer of the following year.
If you are growing larger quantities of plants, you can sow the seed in an outdoor seedbed in late winter. Grow on the seedlings in the seedbed for a couple of years until they are ready to go into their permanent positions then plant them out during the winter.