Form: A low, mounding shrub.
Lifespan: Approximately 30 productive years.
Leaf retention: Evergreen but cold-deciduous.
Growth rate: Rapid.
Mature Size: 2-3' high and 6' wide.
Flowers: Four white petals, many long, pink to purple stamens, one stigma higher than
the stamens, and fragrant. The flower buds, called capers, are edible but usually bitter.
Bloom: Flowers are produced continuously between late spring and late summer. Each flower
lasts less than one day.
Fruit: A small, oblong berry that turns red, then bursts open, displaying moist pulp
embedded with 30-40 small, brown seeds.
The berries, if not grown for seed, are edible but bitter unless cooked or pickled.
Leaves: Green, oval with a slight point, fleshy, on red stems, with two small, curved
thorns at the base of each leaf. Some cultivars are thornless. Young leaves and stems are edible.
Stems: Red to green.
Roots: This plant has extensive, deep roots.
Wildlife: The flowers attract bees, hawkmoths and other pollinating insects.
Toxic / Danger: Not toxic to humans or pets. Small thorns may be present.
Cultivation and Uses
USDA hardiness zones: 8b-11. The plant dies to the ground in freezing temperatures
and its roots die at 18°F. The general rule is that capers can grow anywhere that olive
Heat tolerant: Yes.
Drought tolerant: Yes.
Sun: Full sun. This plant does poorly in shade.
Planting: Caper Bush grows on rocks and in very rocky soil. It grows better in a crevice
in a rock wall or masonry than in a container unless the container is very well drained.
Space the plants 7-9' apart if used for caper production.
Soil: Very well drained, dry, low in organic content. This plant is salt tolerant.
Fertilization is unnecessary.
Water after becoming established: Once a month. It does not like summer rain
and easily dies from being overwatered. In its native region, rain occurs mostly in winter
and spring. It might be necessary, during summer and fall, to grow this plant under a clear
plastic panel that keeps rain out but allows free air flow.
Mulch: Use rock or stone mulch only, in the first year only, when freezing temperatures
Prune: Remove dead wood in winter, but do not prune in the first year. Flower buds
occur on one year old branches. Heavy pruning of old branches improves productivity.
Litter: The entire plant may die to the ground during a freeze.
Propagation: Fresh seed sprout easily but have a low germination rate.
To germinate dried seeds:
 Place them in warm water for 12 hours, allowing the water to cool naturally to room
temperature.  Fold them into a moist paper towel, seal the towel in a plastic freezer bag,
and refrigerate for 2-3 months.  Remove from the refrigerator and soak in water as in
step one.  Plant the seeds in small pots with seed starter soil and keep the soil moist
in a warm, daytime bright environment. They should sprout within 1-3 months. A seed starter
kit with a timed grow lamp and a heater pad (if necessary) is ideal for this stage.
 Transplant the seedlings outside when they are 3-5" tall, adding mycorrhizal fungi to
the soil. If seedlings are crowded in the pot, cut off the weaker seedlings at the ground using
scissors. Do not pull seedlings out because that will damage roots of the others.  Transition
the seedlings to their new, hot and dry environment by providing shade and moisture at first,
then gradually withdrawing shade and moisture as the plant adjusts. Seedlings will not flower
for 1-4 years, depending on the cultivar.
This plant can be grown from both softwood and hardwood cuttings. Hardwood cuttings should
be at least 1/4" in diameter. Softwood cuttings must be from the base of the stem. Rooting
solution is recommended. The success rate of cuttings is 50-70%. Cuttings may take 1-3 years
Uses: The unopened flower buds, berries, and young leaves are pickled in salt or
vinegar, to remove bitterness, and used as seasoning or a garnish. The flavor of the pickled
flower buds (capers) has been described as mustard with black pepper. Young leaves and stems
are also boiled and eaten.
This xeric plant is also used to prevent soil erosion. It can be used as an ornamental
plant hanging from a rock wall or other structure.
This plant is a member of the Caper family (Capparaceae). Another name is Flinders Rose.
It is quite variable in appearance and behavior, and there is no scientific agreement over
its number of subspecies. Many cultivars (cultivated varieties) have been developed, and those
without spines most widely used.
Thriving in very hot, arid climates, and in very poor soil, it can be killed by overwatering
or summer rain.
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Latest update: March, 2020.