About

Hypericum monogynum is a species in the genus Hypericum and the family Hypericaceae, one of the plants commonly called St. John's Wort. Members of Hypericum show a wide range of forms from perennials to shrubs and even small trees, and many woody species produce multiple stems from a single base. Some species in the genus are regarded as invasive, so observe spreading behaviour. In the UK it flowers from June to August.

About the genus

Hypericum is a genus of flowering plants in the family Hypericaceae. The genus has a nearly worldwide distribution, missing only from tropical lowlands, deserts and polar regions. Many Hypericum species are regarded as invasive species and noxious weeds.

Wikipedia contributors, "Hypericum", CC BY-SA 4.0 — Hypericum

In the garden

Hypericum monogynum sits within the genus Hypericum (family Hypericaceae), a group with a near-worldwide distribution outside tropical lowlands, deserts and polar regions. The genus contains a wide array of growth forms — trees, shrubs, annuals and perennials — which means that individual plants of H. monogynum should be assessed by their actual habit before making planting decisions. As a practical approach, treat this species according to whether the plant in hand is woody or herbaceous: woody types tend to be multi-stemmed from a single base and respond to routine formative pruning, while perennial herb forms commonly root from horizontal nodes and can spread at soil level. Propagation by layering or by encouraging natural rooting at nodes works where herbaceous rooting is evident. Be aware that many Hypericum species can spread and are considered invasive in some contexts, so monitor its behaviour after planting. Suitability in a UK garden depends on that growth form — place a multi-stemmed specimen where shrub structure is wanted, or allow an herbaceous form space at the edge of beds where it can root. Expect flowering in the UK from June to August.

More in the Hypericum genus

• 
  Hypericum bequaertii
• Hypericum x inodorum Magical Majestic Pink ('Kolmajepi') (Magical Series)St. John's Wort