Hypericum calycinum - the rose-of-Sharon, not to be confused with Hibiscus syriacus which holds the same name - is a species of prostrate or low-growing shrub in the flowering plant family Hypericaceae, widely popular for its large yellow flowers and ease of cultivation.
It is a low, creeping, woody shrub to about 1 m tall but often smaller, with green, ovate leaves growing in opposite pairs. The leaves are a vibrant green color, with the undersides typically net-veined and in the fall, the leaves take on a purple color.
The flowers are 3–5 cm in diameter, a rich yellow, with five petals and numerous yellow stamens. Its flowers can be described as “rose-like”, flowering in June to September.
Many cultivars and hybrids derived from it.
Sowing & planting
40 - 200
6.2 - 7.6
Plant my rose-of-sharon
Plant your rose-of-Sharon during its rest, preferably between November and March, in well-drained soil, in the sun or semi shade. Plant with a significant spacing with its neighbors as it tends to widen from the base. Water well after planting.
Water my rose-of-sharon
No need to water, except for the first month if you planted late in the season - and of course in case of drought.
Check on my rose-of-sharon
The rose-of-Sharon fears rust, which stains its leaves. It does not matter, but you can cut off the sick parts and burn them.
Prune my rose-of-sharon
The pruning method varies according to the type of St. John's wort: prune those that are persistent simply by removing the end of the branches that compromise the symmetry of the shrub, and remove the faded flowers after flowering.
For the deciduous type, cut the branches entangled at their base, during the winter.
Mulch my rose-of-sharon
Mulch between the shrubs on a few cm thick with crushed wood. For evergreen species, in a harsh climate, mulch a second time before winter.