Eastern cottonwood
Populus deltoides · Salicaceae
The gardener's calendar
In autumn, ease off feeding and take the chance to clean up around eastern cottonwood and prepare for winter.
ID card
- Foliage
- Deciduous
- Blooming
- Spring (catkins)
- Adult size
- 20 to 30 m tall, 10 to 15 m wide
- Growth
- Very fast
- Hardiness
- Zone 3 to 9 (−40 °C to −18 °C)
- Origin
- North America (eastern United States)
- Soil type
- Rich, well-drained, tolerates moisture
Care
Watering
The Eastern Cottonwood appreciates moist to fresh soils, especially during the growing season (spring-summer). Water regularly during prolonged dry spells, particularly in the first three years. Once established, it tolerates water fluctuations well thanks to its powerful root system.
Exposure
Plant the cottonwood in full sun for optimal growth and dense foliage. It will tolerate light shade but will produce less biomass. South or west-facing exposure promotes its rapid development.
Soil and preparation
Prioritize rich, deep, and well-drained soil. The cottonwood accepts slightly moist soils and even calcareous soils. Loosen the soil thoroughly at planting and add compost to stimulate establishment. Avoid overly compacted or waterlogged terrain.
Pruning and trimming
Prune young plants in winter to promote balanced structure. Remove dead or crossing branches. For mature trees, light pruning every 2 to 3 years is sufficient to maintain shape. Avoid severe cuts that would weaken the tree.
Fertilizing
Apply well-decomposed compost or organic fertilizer in spring during the first three years. Once established, the cottonwood needs no additional nutrients thanks to its natural vigor and the return of deciduous foliage.
Health and pests
The Eastern Cottonwood is generally robust. Watch for cankers and poplar rust in humid climates: promote air circulation through appropriate pruning. Some wood-boring insects may colonize weakened trees. A vigorous tree rarely becomes affected.
Did you know?
The Eastern Cottonwood is renowned for its vertiginous growth rate: a young sapling can gain up to 1 meter per year under optimal conditions, which once made it the preferred tree for rapid landscape developments in North America. Its white, soft wood was also widely used for making crates and pulp. In France, it has largely replaced older poplar varieties in commercial operations.
Where to buy it
Best planted in autumn so the roots settle in before summer, or in early spring once the frost has passed. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, October, November.
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Tips generated and checked by Viridia — adapt them to your local climate.