Petrorhagia, plant, maintain in the garden -

Petrorhagia, plant, maintain in the garden -

Pétrorhagia, a carpet of charming little flowers!

Petrohagia, this is a small plant ideal for rock gardens. It hangs everywhere, we sometimes discover it during a walk, hanging on an old wall or in the mountain rocks. the plant is often used for green roofs ... and for good reason, it sometimes colonizes old roofs where it likes to settle!

Petrorhgia have very beautiful, simple foliage of great finesse and a beautiful, bright, glazed green. Its flowers, depending on the variety, can be single, or double, so they look like small pompoms.

Botanical name:

• Petrorhagia saxifraga

Plant type:

• Plant: Perennial
• Foliage: Persistent
• Type of plant: Hardy (up to -20 ° C)
• Family: Caryophyllaceae
• Harbor : sometimes creeping clump
• Exhibition: Sun
• Plantation: Spring
• Flowering: June to September
• Culture Zone: All over
• Origin: Europe, mountainous area

Special features of petrorhagia:

• The plant is more easily found on the French mountains, particularly in the Alps and the eastern mountains.
• It is very resistant to drought episodes.
• Petrorhagia grows in poor soils (limestone, rock, pebbles)

What advantages in the garden

• Easy to grow plant.
• Very floriferous plant
• Rather long flowering 4 to 5 months

What soil for the petrorhagia?

• Dry and poor soil.

What exposure for the petrorhagia?

• The petrorhgia will develop even better with good light. The sun exposure suits him particularly well.

When to plant

• Although the plant is very hardy, it will benefit from a planting in spring.

A word from the amateur gardener:
The poor earth, possibly rocky, which accommodates it, gives the plant a bit of difficulty for its installation. In fact, planting in the spring allows it a few months to settle down before facing the harsh winters.

How to plant a petrorhagia?

The plant is most often delivered in a small container.

• Dig a hole suitable for the size of the container / bucket in depth and also in width.
• The plant will only thrive in poor, dry soil, largely composed of pebbles, and therefore highly drained.
• Place the plant and fill in the gaps with soil from the garden.
• Water little.

Interview :

• Remove dead flowers.


• Petrorhagia flowers from June to September.


Petrorhagia saxifraga "Rosette": the best known, with very small double flowers in the shape of ponpons. • Petrorhagia dubia: with simple flowers and original petals.
• Petrorhagia saxifraga: with single flowers, (our photo).

Which plant does petrorhagia match?

• Plant the plant with other heather plants such as fritillaria, callum, andromeda….

Use of petrorhagia in the ornamental garden?

ATa garden: in a slope, in a mixed grove, between the garden slabs.
• Without garden:
in a large, shallow pot, create a rock garden with other rockery plants.

By keeping a good hygrometry in the air. As such, think about avoid the proximity of radiators and regularly spraying water on the foliage. It is also necessary that the plant has a good light. On the temperature side, we stay between 12 ° C and 24 ° C. Above or below, the gardenia might not bloom. Temperatures can be a little lower in winter. Finally, remember to spare it drafts.

Leaves that turn black can be caused by a substrate too heavy, which does not allow water to drain properly. When planting, remember to place a layer of clay balls at the bottom of the pot. On the watering side, do not soak the earth and do not let water stagnate in the saucer.

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