Populus ciliata, the Himalayan poplar, is a large deciduous tree with tall clean straight trunk and wide rounded crown. The bark of the young trees is smooth and greenish-grey while the bark of the old trees is dark brown with vertical cracks. Leaves are broadly ovate with hairy serrulate-crenate margins. Flowers are drooping raceme catkins that appear before or with leaves. In the wild it grows across Assam, China South-Central, East Himalaya, Myanmar, Nepal and other regions. Grow it in full sun and most soil types. In UK gardens it is fully hardy throughout the UK (RHS H7). It works well for specimen trees and windbreaks. It tolerates soil of any pH, moist but well-drained conditions and south-facing and west-facing aspects. Plant in well-drained soil. Stake young.

Populus ciliata is a member of the Salicaceae family and belongs to the Populus genus, known for its fast-growing deciduous trees that achieve impressive heights. This species features a dioecious reproductive system, meaning that male and female catkins appear on different trees, with males typically being more ornamental. Female catkins, on the other hand, produce cottony seeds that are easily carried by the wind.

https://en.wikipedia.org/wiki/Populus_ciliata

Populus ciliata

Populus deltoides 'Cordata' is a cultivar of the Populus genus, which comprises deciduous trees known for their rapid growth and substantial size. This spreading branched, columnar upright tree thrives in full sun and can be grown in a variety of soil types, including chalk, clay, loam, and sand, with a preference for moist but well-drained conditions. It is hardy in the UK (H7) and suitable for use as a specimen tree or windbreak. The tree produces male and female catkins in spring before leaf emergence, with the male catkins being more visually attractive.

Populus deltoides 'Cordata' is a fast-growing, columnar deciduous tree ideal for specimen planting and windbreaks, thriving in full sun and hardy to H7.

Populus deltoides 'Cordata' (f)

Populus szechuanica var. tibetica, known as the Tibetan poplar, is a deciduous tree cultivar within the Populus genus, which is characterised by rapidly growing, substantial-sized trees. This variety features a spreading branched, columnar upright habit and thrives in full sun with a preference for south- or west-facing aspects. It tolerates a range of soil types including chalk, clay, loam, and sand, and can grow in acid, alkaline, or neutral pH soils that are moist but well-drained. Hardy to UK zone H7, it is suitable as a specimen tree or windbreak and is best planted in well-drained soil with staking for young plants.

Tibetan poplar (Populus szechuanica var. tibetica) is a fast-growing, hardy H7 deciduous tree ideal for specimens and windbreaks in full sun.

Populus szechuanica var. tibetica

Populus trichocarpa, the black cottonwood, western balsam-poplar or California poplar, is a deciduous broadleaf tree species native to western North America. It is used for timber, and is notable as a model organism in plant biology. The tree is notable for the seed-carrying cottony fluff it releases into the air each spring. In the garden it prefers full sun and most soil types. In UK gardens it is fully hardy throughout the UK (RHS H7). Suggested uses include specimen trees and windbreaks. It tolerates soil of any pH, moist but well-drained conditions and south-facing and west-facing aspects. Plant in well-drained soil. Stake young.

Western balsam poplar (Populus trichocarpa) belongs to the Salicaceae family and is one of the many fast-growing trees in the Populus genus, known for their significant size. This species is dioecious, meaning it features separate male and female trees, with the male catkins appearing more attractive while the female trees produce cottony seeds that can be blown by the wind.

https://en.wikipedia.org/wiki/Populus_trichocarpa

Populus trichocarpa

Populus x canescens 'Macrophylla', known as Pickart's poplar, is a deciduous tree cultivar within the Populus genus, which comprises rapidly growing trees often reaching substantial sizes. This cultivar features a spreading branched to columnar upright habit and thrives in full sun with exposure ranging from sheltered to exposed sites. It grows well in a variety of soil types, including chalk, clay, loam, and sand, with moisture levels that are moist but well-drained and pH ranging from acid to alkaline. Suitable for use as specimen trees or windbreaks, it flowers in spring before leaf emergence and is hardy to UK zone H7.

Pickart's poplar (Populus x canescens 'Macrophylla') is a hardy H7 specimen tree ideal for windbreaks, with interest in spring and summer.