Peter Dummer: golden bowl flowers above a low shrub

Your care table

Flowers light up the small shrub

Peter Dummer has yellow bowl flowers with a prominent centre of many stamens. Below stand elongated green leaves whose undersides may look paler. Flowers belong to a small woody shrub, not low turf. In a mixed bed it can form its own summer area in front of taller woody plants. The young sales-pot plant initially shows only a small framework. Even a later especially floriferous shrub need not carry open flowers on delivery. Getting to know leaves and shoots first usually assesses structure better than a single summer flower picture.

A documented hybrid cultivar for the garden

Its botanical name is Hypericum × dummeri Peter Dummer. The cross marks its hybrid classification; the cultivar name preserves the particular selection. Other St John’s worts may grow very differently or emphasise flowers and fruit differently. Measurements from a taller fruit shrub are therefore not transferred here. It is an ornamental woody garden plant. The name St John’s wort makes no claim about medicinal use. Planning focuses on low woody growth, elongated foliage and yellow flowers that can extend from summer into autumn in suitable conditions.

Start small and keep sideways space free

Set plants each stand in a 9 cm pot at about 10–25 cm total height including pot. About 30–70 cm guides older shrub height; cultivation and site change its framework. Different cultivar profiles describe a lower or more developed stand, not an exact final height for every plant. The offer gives about 50–60 cm spacing. Lay pots out and consider the group as future shrubs with side branches. Initially visible soil is no planting mistake. Close to a path or among small sensitive perennials, later branches instead need repeated attention.

A bright place needs suitable root soil

Sun to partial shade suits the cultivar. Observe the intended position through the day, especially beside a warm wall. Much light helps, but a heated small pot surface can dry the young ball faster. In beds, prepare loose well-drained soil and check where water goes after heavy rain. A hole in compacted surroundings should not become a wet tub. In containers, free drainage and stable soil structure matter. Pretty surface decoration or a sunny flower photograph cannot show whether enough air and reliable drainage exist underneath.

Remember the small balls in the first season

Plant in spring or suitable early autumn when soil is frost-free, workable and not waterlogged. Wet the ball, carefully remove the pot and plant at its old height. Water thoroughly afterwards. In following weeks, check directly at the ball whether water reaches it and how quickly it dries again. An older shrub gains more root space; those later reserves do not excuse neglecting a young specimen. Well-supplied soil does not automatically call for much extra fertiliser in young growth. Light, soil contact and moisture first explain its entry into the first season.

Consider flowering and pruning together

The cultivar is described with yellow flowers from July to October. This is a possible summer-to-autumn course, not a promise of open flowers every day throughout. Weather, location and age affect visible flowering. In spring, remove dead parts and arrange branching appropriately. Wait to see which shoots actually regrow rather than judging bare winter twigs by colour alone. Clean targeted pruning helps keep a manageable form. Last year’s flowers are a useful reminder of space, not a fixed pruning plan for every garden.

Support the low shrub through winter

Peter Dummer is semi-evergreen. Some foliage may remain while cold and position change its appearance. It stays outdoors; an outdoor container needs shelter, appropriate root protection and open drainage. Check moisture on frost-free days, especially beneath a roof. In spring, first look for new buds and living shoots. Individual old leaves or a more open winter framework do not automatically make it unusable. If whole shoots change noticeably, check roots and seek the cause. The next summer starts with a healthy structure, not as much extra fertiliser as possible.

One plant, several views

Good to know