Lady Slipper

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Phoenix's Most Sculptural Desert Succulent for Modern Landscapes Pedilanthus macrocarpus, commonly known as Lady Slipper Plant, Slipper Spurge, or Candelilla, is one of the most st riking architectural succulents available for Phoenix Valley landscapes. This Sonoran Desert native features smooth, upright grayish-green stems that curve and branch gracefully, creating a living sculpture that looks stunning in modern and desert-contemporary designs. In late spring and summer, bright orange-red slipper-shaped flowers appear at the stem tips, adding a burst of color to an already dramatic form. Whether you're designing a sculptural focal point in Scottsdale, filling a modern planter in Paradise Valley, or building a drought-proof xeriscape in Chandler — Lady Slipper delivers unmatched visual impact with zero fuss. Lady Slipper Plant Details Attribute Detail Scientific Name Pedilanthus macrocarpus Common Names Lady Slipper Plant, Slipper Spurge, Candelilla, Lady Slipper Euphorbia Mature Height 2–4 feet (can reach 5 feet at maturity) Mature Width 3–5 feet Growth Rate Moderate — reaches full form in 3–4 years in Phoenix Sun Full sun to light shade. Handles reflected heat from walls and pavement. Water Very low once established. Extremely drought-tolerant — true desert native. USDA Zones 9–11 (Phoenix is Zone 9b–10a) Soil Well-draining required. Thrives in rocky, sandy soil and Arizona caliche with good drainage. Foliage Leafless succulent — smooth gray-green stems provide year-round interest Bloom Color Orange-red slipper-shaped flowers, late spring through summer Native Status Native to the Sonoran and Baja deserts Lady Slipper Uses in Phoenix Landscapes Sculptural Focal Point Lady Slipper's arching, leafless stems create an unmistakable architectural silhouette that anchors any garden bed or courtyard. Plant a single specimen in a prominent position — near an entryway, pool feature, or outdoor seating area — where its graceful curves can be appreciated up close. Uplight at night for dramatic shadow play against walls. Modern Desert & Contemporary Design The clean, minimalist form of Lady Slipper is tailor-made for modern desert landscapes popular in Scottsdale, Paradise Valley, and North Phoenix. Mass-plant 3–5 specimens at 3-foot spacing for a bold, cohesive statement. Pairs perfectly with decomposed granite, steel planters, and geometric hardscape. Combines beautifully with Blue Yucca and Desert Spoon for layered sculptural texture. Drought-Proof Xeriscape As a Sonoran Desert native, Lady Slipper requires almost no supplemental water once established — making it one of the most water-efficient landscape plants available for Mesa, Gilbert, and Tempe. Plant along property borders, in median strips, or in commercial landscapes where irrigation is minimal. Best Time to Plant Lady Slipper in Phoenix Spring (March–May) is the ideal planting window for this warm-season succulent. Warm soil and increasing daylight promote rapid root establishment. Fall (October–November) also works well. Avoid planting in winter when cool temperatures slow root growth for succulents in this family. How to Plant Lady Slipper Dig wide, not deep — hole should be 2–3x the root ball width, same depth as the container. Check for caliche — break through any hardpan layer. Lady Slipper absolutely cannot sit in waterlogged soil. Amend with pumice or decomposed granite — mix 30–50% into backfill for fast-draining soil. Spacing — 3 feet apart for mass plantings; 4–5 feet for individual specimen placement. Do not bury stems — keep the base at the same level as the nursery pot to prevent rot. Top dress with gravel — 2–3 inches of decorative rock mulch to keep the root crown dry and complement the desert aesthetic. Watering Lady Slipper in Phoenix First Year Watering Schedule Weeks 1–2: Every 5–7 days, light watering to settle roots. Month 1–3: Every 10–14 days. Month 3–12: Every 2–3 weeks. After Year 1: Monthly in summer; no supplemental water needed in winter. Always let soil dry completely between waterings. Drip Irrigation Place one 0.5-GPH emitter 8–12 inches from the plant base. Established Lady Slipper plants in the ground may need supplemental water only during the most extreme summer heat. Overwatering is the primary cause of failure — when in doubt, don't water. How fast does Lady Slipper grow in Phoenix?Lady Slipper grows at a moderate pace, adding 6–12 inches of stem growth per year in Phoenix. A 1-gallon plant will reach an attractive specimen size in 3–4 years. Larger container sizes (10–25 gallon) provide instant impact in the landscape. Is Lady Slipper cold hardy in Phoenix?Yes. Lady Slipper handles Phoenix winters well and tolerates temperatures down to about 25°F. In rare hard freeze events, stem tips may show minor damage but the plant recovers quickly in spring. It's well-suited to all Phoenix Valley microclimates. Is Lady Slipper toxic?Lady Slipper is a member of the Euphorbia family and produces a milky white sap (latex) when stems are cut or damaged. This sap can irritate skin and eyes. Wear gloves when handling or pruning, and keep the sap away from pets and children. Does Lady Slipper attract hummingbirds?Yes. The bright orange-red slipper-shaped flowers are highly attractive to hummingbirds. Plant near outdoor living spaces to enjoy close-up hummingbird visits during the bloom season from late spring through summer. You May Also Like Desert Milkweed — Another sculptural Sonoran native with fragrant blooms and butterfly appeal. Blue Yucca — Bold blue rosette that pairs dramatically with Lady Slipper's curves. Cow's Horn Euphorbia — Striking thorned succulent for a bold desert statement. Desert Spoon — Silver-blue rosette that complements Lady Slipper in modern xeriscape designs. How Many Lady Slipper Do I Need? Lady Slipper is an architectural specimen that matures around 3 to 5 feet wide, so it is sized for grouping rather than tight hedging. Plant a single clump as a sculptural focal point, or set odd-numbered groups of 3 to 5 spaced about 3 feet apart so each branching form reads clearly. For a bold modern run along a wall or walkway, repeat at 3 to 4 foot centers: Run Length At 3 ft spacing At 4 ft spacing 10 ft 4 plants 3 plants 20 ft 7 plants 6 plants 30 ft 11 plants 8 plants Give it at least 2 to 3 feet of clearance from walkways and seating so the brittle, sap-filled stems are not brushed or snapped. Lady Slipper Season-by-Season in Phoenix Spring (Mar to May): The best planting window. New stem growth flushes and the first orange-red slipper flowers open at the tips, pulling in hummingbirds. Summer (May to Sep): Peak performance in full sun and reflected heat. Bloom continues through the warm months and monsoon rain is usually all the water it needs. Let soil dry fully between any extra waterings. Fall (Oct to Nov): A good secondary planting window. Growth slows as nights cool but the gray-green stems hold their sculptural form. Winter (Dec to Jan): Evergreen structure year-round, hardy to about 25°F. A rare hard Valley freeze may nip stem tips, but the plant rebounds in spring. Cover only in an unusually hard freeze. At a Glance ✔ Arizona Native ✔ Hummingbird-Friendly ✔ Heat-Loving (Reflected-Heat Tolerant) ✔ Drought-Tolerant ✔ Pool-Friendly (Low-Litter) ✔ Evergreen ✔ Low-Maintenance ✔ Fire-Wise ✔ Deer & Rabbit-Resistant ✔ Cold-Hardy to 25°F Plant It With Blue Yucca: a bold blue rosette that contrasts with Lady Slipper's curving green stems. Desert Spoon: silver-blue spoon-tipped leaves that complement the sculptural form in xeriscape beds. Red Yucca: arching grassy clumps with coral flower spikes that extend the hummingbird draw. Ponytail Palm: another architectural specimen that anchors a modern desert grouping. Is Lady Slipper Right for Your Yard? It thrives in full sun to light shade with fast-draining soil: rock gardens, modern courtyards, hot walls, and pool-side beds where its leafless, low-litter form shines. Break through caliche and amend heavily with pumice so the crown never sits wet. Not a fit if you need a soft, child-safe plant in a busy play area: it is in the Euphorbia family and the milky sap can irritate skin and eyes, so handle with gloves and keep it back from high-traffic spots. Show more