Gaura lindheirmeri 'Cool Breeze' is a named garden cultivar in the genus Oenothera (family Onagraceae). It is valued for its extended summer display, flowering from June to September. The plant is supplied under this cultivar name and should be identified by the full botanical label. Growers and buyers commonly choose it where a prolonged bloom period is wanted through the summer months.

Gaura lindheirmeri 'Cool Breeze' flowers from June to September and is sold as a named Oenothera cultivar for extended summer display.

Gaura lindheirmeri 'Cool Breeze'

Gaura lindheirmeri 'Cool Breeze' | Summer blooms

Oenothera cespitosa, known commonly as tufted evening-primrose or fragrant evening-primrose, is a perennial plant of the genus Oenothera native to western North America from the western edge of the Great Plains and all parts of the Intermountain West in a wide range of dry habitats. Its flowers are open at night and fade by the next day. The species is cultivated in gardens, particularly in its native range. Grow it in full sun and loam soil. In UK gardens it is hardy in most of the UK (RHS H5). It works well for city and courtyard gardens, coastal, cottage and informal garden, gravel garden, prairie planting, low maintenance, banks and slopes and flower borders and beds. It tolerates neutral soils, well-drained conditions and south-facing aspects. Plant after last frost in fertile soil.

Oenothera caespitosa, commonly known as tufted evening primrose or cowboy lily, belongs to the Onagraceae family. This species features a tufted growth habit with simple or lobed leaves, and it is known for its ability to thrive in various conditions, producing bowl-shaped flowers that add to its appeal.

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

Oenothera caespitosa

Oenothera deltoides, commonly known as desert evening primrose or birdcage evening primrose, is a suckering deciduous plant within the Oenothera genus. This genus includes annuals, biennials, and perennials with simple or lobed foliage and bowl-shaped flowers in white, yellow, or pink, which bloom through much of the summer. Oenothera deltoides thrives in full sun on south-facing, sheltered aspects with well-drained, neutral loam soil. It is hardy to UK zone H5 and is suitable for various garden styles including city, coastal, cottage, gravel, prairie, and informal gardens.

Desert evening primrose (Oenothera deltoides) is a hardy, suckering perennial ideal for sunny borders, gravel gardens, and coastal sites from summer to autumn.

Oenothera deltoides

Oenothera lindheimeri 'Whirling Butterflies' is a clump-forming herbaceous perennial in the Onagraceae family. This deciduous plant typically grows to between 0.5 and 1 metre in height with a spread of 0.1 to 0.5 metres, reaching full size within 2 to 5 years. It thrives in full sun or partial shade, favouring south- or west-facing aspects, and tolerates both exposed and sheltered conditions. Suitable for chalk, loam, or sand soils with a range of pH levels, it prefers moist but well-drained to well-drained soil. Its season of interest spans spring, summer, and autumn.

Gaura 'Whirling Butterflies' is a clump-forming perennial reaching up to 1m, flowering from spring to autumn in full sun or partial shade.

Oenothera lindheimeri 'Whirling Butterflies' (G)

Oenothera subterminalis is a herbaceous perennial cultivar within the Oenothera genus, known for its suckering habit and deciduous foliage. This plant thrives in full sun on south-facing, sheltered sites with well-drained, neutral loam soil. It blooms throughout summer and into autumn, producing bowl-shaped flowers typical of the genus. Suitable for a variety of garden settings including city courtyards, coastal areas, cottage gardens, and gravel or prairie plantings, it is hardy in the UK (H5) and benefits from fertile, moist soil conditions.

Oenothera subterminalis is a hardy herbaceous perennial with deciduous foliage, ideal for sunny, sheltered sites and summer to autumn interest.