St. John's wort - Hypericum anagalloides

Generalitā Hypericum anagalloides

Water hypericum is a perennial aquatic plant, widespread in the marshes of North America; it has slightly fleshy stems, of a brownish-green color, with a prostrate or creeping habit, which branch off from vigorous stoloniferous roots.
Where the stems touch the ground, they tend to root easily, and this aspect facilitates a rapid diffusion of the hypericum plants that colonize the soil and gradually spread out in patches.
The leaves are attached directly to the stem, without petiole, of a bright dark green color, thick and waxy, becoming purple red in autumn .; from May to September it produces numerous small star-shaped flowers, of very intense golden yellow color, followed by small semi-woody capsules containing numerous dark seeds. These plants tend to rapidly colonize the soil and in some cases can become infesting with time. Almost all varieties of hypericum are toxic to animals, if consumed in large quantities, and are used in herbal medicine.


Locate Hypericum anagalloides plants in full sunlight, since they are species that love the sun, or in the partial shade; plants grown in full shade grow very well, but tend to produce few flowers. This species of hypericum develops at its best in the vicinity of calm waterways or small shallow lakes, as it requires constant soil moisture; sometimes the stems and leaves can float on the surface of the water, so it is possible to plant this plant even inside an aquatic garden, or on the banks of a pond. It does not fear the cold, even if the aerial part often dries up during the coldest months of the year.
Water hypericum can also be grown in pots as long as a deep substrate is chosen and the soil is kept constantly moist to recreate the optimal conditions for this species.


As for the cultivation surface, Hypericum anagalloides develops in any soil, but prefers calcareous soils; It is possible to grow these plants even in a container, but it is necessary to provide them with a very large pot, and to water them regularly, even twice a day. It is a very rustic plant on the whole that adapts to many situations but that in those listed can give its best.


The multiplication of the Hypericum anagalloides generally occurs by division: at the beginning of spring or autumn the lateral shoots are taken already rooted, and are immediately dwelling individually. It is also possible to propagate these plants by seed, but it is good to remember to keep the small seeds in water for at least 8-12 hours before sowing. This method is undoubtedly the safest and fastest for this species.

St. John's wort - Hypericum anagalloides: Pests and diseases

Speaking of diseases and pests, these plants are very vigorous and rustic and are generally not attacked by pests or diseases. The Hypericum anagalloides resists well to the winter and in the cold zones it tends to lose, for desiccation, the aerial part to then resume the vegetative activity at the beginning of the beautiful season.