Rose Von Sharon Yellow

Class

Dicotyledons

Division

Angiospermae

Family

Hypericaceae

Order

Malpighiales

Genus

Hypericum

Species

calycinum

Description

Vigorous perennial ornamental plant. The bushy, ground cover habit allows for dense green ground cover areas dotted with striking yellow-gold flowers of high landscape value. Suitable for flowerbeds, borders and rock gardens as well as balconies and terraces in planters and pots.

Variety description

Plant with a very striking flowering in late spring, summer, deep yellow. Ideal for flowerbeds and borders.

Curiosities and special features

The common name 'St John's Wort' derives from the popular tradition of hanging a bunch of St John's Wort in front of the house door on 24 June to ward off evil spirits.

Origin and distribution

A species native to the mountainous territory stretching from south-eastern Bulgaria to north-western Turkey.

Flower size

The flower is small, lending elegance to the bloom.

Leaf

The leaves have a lobed lamina.

Flowering period

It flowers from mid-spring to summer for a duration of 60 to 90 days.

Leaf colour

Plain-coloured, in perfect colour contrast with the bright shades of the flowers.

Plant height

The plant's height varies from 0.3 to 0.6 m. It is suitable both in homogeneous groups to create ground cover and in compositions with other ornamental species.

Lifespan

Evergreen or semi-evergreen perennial plant.

Where to plant

Versatile, due to its bearing and dramatic flowering in warm, bright colours, it is suitable for adding ornamental value to flowerbeds, flowerbeds, outdoor tubs, planters

Stem

The stem is herbaceous; the variety has no thorns.

Flower

The flower is simple in form, small in size, with a pinkish corolla and single-coloured petals. It flowers from mid-spring to summer, with a flowering period of between 60 and 90 days. It has sweet notes and is lightly scented, with a delicate aroma. It is attractive to bees, butterflies and bumblebees.

Growth

Variety with medium to vigorous growth.

Plant habit

It develops a bushy habitus, creating dense, colourful hedges.

Branching

The abundant branching allows for highly landscaped results.

PH

It requires a slightly acidic soil or substrate pH between 6.0 and 6.8.

Soil preparation

Before transplanting into the bed, dig 20/30 cm deep to remove any weeds, residues of previous crops and bulky pebbles, then bury slow-release organic or chemical fertiliser to provide the necessary nutrients in the first phase of development after planting. Continue, using a hoe, by breaking up the coarser clods to obtain greater softness and improve fertiliser distribution. Finally, distribute professional-quality substrate for ornamental plants on the surface for approximately 5/10 cm and level off with the help of a rake.

Sun exposure

Choose exposures in half shade, full sun, sheltered from intense wind.

Ideal climate and temperature

The ideal temperature is between 15 and 30 °C. The vital temperature is between -10 and 30 °C

Use

Its bright blooms give it a primary role in:

Outdoor ornamental Outdoor Landscape Design Landscaping

Hardiness

Highly rustic variety.

Soil

It adapts to different soil conditions, however, the ideal soil for a better vegetative development and luxuriant flowering of St. John's Wort is medium-textured and well draining. In planters and tubs use a coarse potting soil for roses containing peat, clay granules, lapilli and extruded wood fibre.

Difficulty

Cultivation of Calycium St. John's Wort is easy, with a low level of management effort following enfranchisement at the new planting site.

Growing tips

For best vegetative growth and abundant flowering, it is recommended to

Expose the plant to maximum light Avoid over-watering

However, avoid transplants in very hot areas with all-day exposure to the sun, especially in water shortage, to prevent leaf burns.

Combinations with other plants

Ideal for compact and colourful ornamental compositions, also associated with blooms with different heights in order to create perspective views; colour combinations can include shades of the same hue or an alternation by choosing from the different varieties available, composing designs or patterns according to personal fantasy. Colour spots or simple borders can be formed with other species such as Dianthus, Gaura, Iberis, Pennisetum alopecuroides, Perovskia, Rudbeckia fulgida.

When transplanting, a suitable planting pattern should be adopted and each individual plant should be arranged in relation to its habit, height and desired colour combination.

Planting

For planting in flowerbeds we recommend an average density of 8 plants per square metre in order to ensure proper development of the root and aerial apparatus of each specimen, thus obtaining a harmonious and proportionate final composition. We suggest positioning each seedling without sinking the lump completely, taking care not to damage the roots.

Pruning

Carry out a cleaning of the vegetative part by removing damaged stems and wilted flowers.

Propagation

Multiplication can be by division of the head, by division of the rhizome and by cuttings.

Watering

Use rainwater, or alternatively aqueduct water with an optimal sub-acidic pH, either manually or by means of an irrigation system. Immediately after transplanting intervene with balanced supplies free from saturation conditions and assist the seedling in the first stages of development in the new planting site. After planting, keep the substrate or soil moist at all times, but avoid waterlogging, which can lead to leaf yellowing and root rot. It is also advisable not to water the aerial part of the plant during the afternoon/evening and to avoid water stress, particularly in high light, which can cause leaf burns.

Fertilising

During pre-transplant soil preparation, carry out a background fertilisation by burying organic or slow-release chemical fertiliser. During the spring-summer period, following proper post-transplant settling, apply a balanced liquid fertiliser specifically for ornamental plants to the substrate or soil, to be diluted in the irrigation water according to the appropriate doses and frequencies as indicated on the relevant information label.

Edibility for humans

Non-edible Species.

Tip

Plant that plays an important role when used as a border or ground cover. It can cover well by counteracting other weeds.