Capparis spinosa, commonly known as the caper bush, is a low-growing, perennial shrub native to the Mediterranean region and parts of Asia. This drought-tolerant plant is well-known for its edible flower buds (capers) and fruit (caper berries), both of which are widely used in Mediterranean cuisine. It features spreading, spiny branches and thick, round leaves, and produces delicate white to pinkish flowers with long, purple stamens. Growing to about 1–3 feet (30–90 cm) tall and spreading up to 5 feet (1.5 meters) wide, the caper bush thrives in full sun and well-draining, rocky or sandy soils. It is often grown on terraces, walls, and dry slopes where few other plants can survive. Suitable for USDA Hardiness Zones 8–11.
To germinate Capparis spinosa seeds, start by scarifying the seed coat with a file or sandpaper to improve water absorption. Then soak the seeds in warm water for 24 hours. Next, cold stratify the seeds for 30–60 days by placing them in a moist medium like sand or peat, sealing in a plastic bag, and storing at 35–41°F (2–5°C). After stratification, sow the seeds about 1/4 inch (6 mm) deep in a sandy, well-draining soil mix. Keep the growing medium warm—ideally around 75–85°F (24–29°C)—and lightly moist. Germination can be slow and erratic, often taking 2–6 weeks or more. Transplant seedlings into larger containers once they establish several sets of true leaves, and gradually acclimate them to outdoor conditions before planting.
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