About
Phlox x arendsii 'Hesperis' is a hybrid phlox in the Polemoniaceae that offers sustained summer flowering. It is grown for its season-long display from June to September. Plants form multi-stemmed clumps that produce compact flower heads over several weeks. Regular deadheading and occasional division keep plants productive.
About the genus
Phlox is a genus of 68 species of perennial and annual plants in the family Polemoniaceae. They are found mostly in North America in diverse habitats from alpine tundra to open woodland and prairie. Some flower in spring, others in summer and fall.
Wikipedia contributors, "Phlox", CC BY-SA 4.0 — Phlox
In the garden
Phlox x arendsii 'Hesperis' sits within the genus Phlox and the family Polemoniaceae and is one of the garden hybrids selected for extended summer bloom. As a cultivated phlox, it is valued for providing colour through the summer months and fits into perennial planting schemes where continued flowering is needed. Its flowering season runs from June to September. Choose a site with reasonable air movement to reduce foliage diseases, and avoid prolonged waterlogging at the roots. Remove spent flower stems during the season to encourage further bloom and tidy the plant for neighbour planting. Established clumps benefit from lifting and dividing when they become congested; this refreshes vigour and can be done outside frosty conditions. Short stems can be cut for vase work while the plant is in full flower, and dividing also offers a straightforward propagation route. Where space allows, plant 'Hesperis' among later-flowering perennials to extend the border sequence; it also works well in mixed-cottage and formal beds where a steady summer display is required. Expect reliable flowering from June to September, making this cultivar a practical choice for summer borders and cutting gardens.
From the Fenn Plants journal
- Notes on DaffodilsWhen to plant daffodil bulbs in the UK, how deep, how to naturalise them in grass, why daffodils stop flowering (“blindness”), and why you should never mix cut daffodils with other flowers.
- Keeping Your NerveHow to garden through a heatwave — the best time to water, why deep soaks beat daily sprinkles, caring for pots and vulnerable plants, and why you can let the lawn go brown.
- Made to LastHow to clean, store and protect garden pots and planters — the frost-proof vs frost-resistant difference, winter care for terracotta and ceramic, and how to reuse a broken pot.
More in the Phlox genus
- Phlox 'David'
- Phlox 'Mount Fuji'
- Phlox glaberrimasmooth phlox
- Phlox maculatameadow phlox
- Phlox maculata 'Alpha'meadow phlox 'Alpha'
- Phlox maculata 'Miss Lingard'Meadow Phlox 'Miss Lingard'
- Phlox maculata 'Omega'meadow phlox 'Omega'
- Phlox ovataAllegheny phlox
