JUSTICIA: sow, plant, cuttings, maintain with

JUSTICIA: sow, plant, cuttings, maintain with

Justicia, a very floriferous shrub ...

That's right, the justicia (or even acobinia carnea, justicia pohliana, justicia magnifica) maybe completely covered in flowers all summer and even longer, from May-June to September. Justicia rizzinii bears leaves reminiscent of those of boxwood without its characteristic scent while iusticia americana or American carmantine, has a more natural appearance. There are many, many varieties. Justicia is little or not rustic. In colder regions the plant should be grown in a pot, which it accepts perfectly well. The shrub can reach up to 1 meter in height. It is a very easy "tropical" plant in the garden and its many varieties are so many proposals (ports or blooms) pleasing to the eye for the garden and winter for the veranda ...

Botanical name:

• Justicia spp

Plant info:

• Cycle: Perennial
• Foliage: Persistent
• Hardiness: Little or not hardy plant (-2 to 2 ° C)
• Family: Acanthaceae, acanthaceae
• Ports: Shrubby habit
• Exhibition: Sun to partial shade.
• Ground : Any very drained soil.
• Sowing: -
• Plantation: spring
• Flowering: May-June to August
• Fruiting:
• Rooting: roots
• Cultivation area: Zone 10 - see the hardiness card France or Quebec
• Origin: South America
• Honey plant:
• Edible plant: No
• Poisonous Plant: No

Particularities of the Justicias

• In the regions most protected from the cold, it is still necessary to protect the stump of the shrub.

What advantages in the garden:

• Superb flowering with many colors.
• Very easy in the garden.
• There are many varieties with different flowering and sizes and justicia is always a very aesthetic plant.

What an exhibition for justicia

• Sun to partial shade depending on the variety.

A word from the gardener:

The juiceticia always appreciates a light shade and is sometimes subjected to too strong and direct rays of the sun.

What soil?

• Any very drained soil.

When to plant Justicia

• Rather in spring from March (mild region) or April cold regions.

How to plant them?

• Choose a sunny exposure.
• Work the land.
• Dig a hole deeper than the height of the Justicia container.
• Mix garden soil with planting soil.
• Improve its draining power by adding sand to the soil if necessary.
• Scrape the justicia's root ball to free the roots and immerse it in a bucket of water.
• Place it in the ground, fill with the soil mixture.
• Tamp and water.
• Water on dry soil.

How to install the justicia in a container or large pot?

Justicia is a magnificent shrub and in colder regions it would be a shame to go without. Especially since it is a shrub that accepts container culture well.
• Provide a nice pierced pot, rather earthenware, 50cm in diameter and 60 deep.
• Place a gravel bed.
• Add a mixture of planting soil and sand (75/25%).
• Put the justicia in place without burying the collar.
• Tamp and water.

Method of multiplication?

• Cuttings and seedlings.

When to cut justicia?

• Summer division from June.

How to cut it?

• Select non-flowering shoots of the year of about 25 cm.
• Remove the leaves from the bottom (near the cut) and
• Keep the last 2 rows of leaves.
• Fill a pot with planting soil and sand (25%)
• Push the shoot 15 cm into the soil.
• Water generously.
• Cover the shoot tightly with a freezer bag, tightening it on the pot with a rubber band.
• Place the cutting in the sun ... If the rays are too "violent" protect the cutting.

Interview :

• Remove dead flowers.
• In mild regions, mulch the stump of the shrub.
• Bring the pot in the less lenient areas.
• For Justicia Rizzinii and Californica, it is important to pinch off the shoots in the long run to maintain a regular shape of the shrub.

Flowering of justicia:

• Magnificent flowering of yellow, orange, white, pink ...
• From June to September.
• Depending on the variety, the flowers can be quite different in shape.


Justicia Carnea: flowers duster-shaped, non-hardy, with very large leaves.
Justicia floribunda Rizzinii: cylindrical, bicolor, yellow and red orange flowers.
Justicia californica : forms a bush 1.5 m in height, and in width. Its branches are greyish green and are much branched. The shrub has few leaves compared to Rizzinii, they are oval and slightly downy Justcia Californica is a deciduous variety.


Justicia does not appear to be susceptible to disease.

What to plant with?

• With palm trees, cistus, in a pot in a tropical plant mixture to bring in in the fall.

Use :

ATa garden: in tropical massif, in protected hedge.
• Without garden:
Justicia is a beautiful, regular shrub in a pot.

Photo by Aiwok - picked from - under Creative Commons - CC BY-SA 3.0.

Quick sheet:


Item name

Justicia, very floriferous shrub, in the garden or in pots


Justicia is a genre that has a lot of varieties. Most are non-rustic or somewhat rustic, which involves a potted fence for colder regions. Justicia rizzinii is a superb shrub very floriferous as the justicias often are. All the information you need to know to grow them well is on our website


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Credit: frwooar / iStock

Gardening with the moon

Following the lunar calendar is, for some, one way to get good results for their garden. It must be said that this is an ancestral method that allows you to follow the seasons. So, effectiveness or not? We explain to you.

The influences of the moon - which revolves around the Earth - have real impacts on our planet. This is especially noticeable with the flow of the tides and even the growth of hair! Could plants and plants, made up of water, also have this action exerted by this satellite? Following the rhythm of the moon for gardening is, in any case, an ancestral technique that is coming back to the fore with organic and ecological plantations. Thus, following the lunar calendar is like referring to the ascending and descending movements of the star. Some believe that the ascending period is suitable for harvesting because this is the time when the sap rises up in the stem. Conversely, during the descending period, the sap goes back down to the roots, so it will be necessary to weed, prune and add compost and fertilizer. There is also a bad time that should not be overlooked: when the moon is at the furthest point from Earth. Better to avoid taking any action during this unfavorable time. While this is not scientifically proven, the fact remains that following the rhythm of the moon will allow you to acquire strict discipline which should, however, do your garden good! All you have to do is download a lunar calendar and roll up your sleeves! Convinced?

Ascending and descending moon VS waxing and waning moon It is not always easy to understand the lunar calendar properly. Some vocabulary bases to know and differentiate:
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Descending moon Harvest the root vegetables (in root day). Plant, transplant, prune, multiply (cutting at the beginning of the waning moon, dividing, layering), to be used with the favored part of the plant. Work the soil, bury green manures. Sow.
Rising moon Harvest the aerial parts (in fruit, flower or leaf day depending on the part harvested), take the grafts and graft (in fruit or flower day). Sow.  Waxing moon / waning moon The waxing and waning phases of the moon have little influence on crops in the garden.

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