Archives: Plants

Leptospermum scoparium, commonly called mānuka or New Zealand tea tree, is an evergreen shrub in the myrtle family valued for its profuse spring blossoms and aromatic foliage. Native primarily to New Zealand and parts of southeastern Australia, it forms dense, twiggy growth with small, prickly, citrus-scented leaves and papery, shredding bark. Single or double flowers—typically white, pink, or deep rose—cover the plant in late winter to late spring and attract bees that produce the famous mānuka honey. In gardens it reaches 1–3 m (3–10 ft), sometimes more in mild climates, and thrives in lean, acidic, sharply drained soils. It tolerates coastal exposure, wind, and poor soils but is sensitive to waterlogging and alkaline conditions. Light, post-bloom pruning helps maintain shape; avoid cutting into old, leafless wood. In containers, it benefits from a cool, bright winter rest to promote heavy flowering. Susceptibility includes root rots under excess moisture and myrtle rust in some regions; good airflow and careful watering are essential.

Aspidistra elatior is a hardy, rhizomatous evergreen perennial prized for its remarkable tolerance of low light, irregular watering, and fluctuating indoor conditions—hence the common name “cast-iron plant.” Native to East Asia, it forms clumps of leathery, lanceolate leaves that rise directly from creeping rhizomes, typically 30–60 cm tall. The foliage is deep green in the species, with numerous cultivars exhibiting variegation or speckling. Unusual, starry, maroon to brownish flowers are borne at soil level and are often unnoticed, thought to be pollinated by ground-dwelling insects. Historically popular in Victorian interiors and dim public rooms, Aspidistra remains a benchmark for durable houseplants and is also grown outdoors in mild climates as a shade groundcover. In Japan, its leaves (haran) are used in floral design and as decorative dividers in cuisine. It thrives in well-drained, humus-rich soil, appreciates even moisture, and benefits from gentle feeding, yet will endure considerable neglect while maintaining attractive, architectural foliage.

Convallaria majalis, commonly known as lily of the valley, is a rhizomatous, shade-loving perennial famed for its intoxicating fragrance. Emerging early in spring, pairs of lanceolate to elliptic leaves (10–20 cm long) unfurl from creeping rhizomes, followed by arching scapes bearing rows of 5–15 pendent, waxy, white bell-shaped flowers. These bloom in late spring and are sometimes followed by small orange-red berries. Over time, clonal colonies form a dense, weed-suppressing groundcover in cool, humus-rich woodland conditions. Extremely hardy, it tolerates cold winters and prefers evenly moist, well-drained, slightly acidic to neutral soils. While largely carefree, it can spread aggressively in hospitable sites and may require edging to contain. All parts are poisonous due to cardiac glycosides; ingestion can cause serious symptoms, so site away from children and pets. In gardens it is valued for naturalizing beneath deciduous trees, as a cut flower, and for forcing pips for indoor bloom. Several cultivars exist, including double-flowered and variegated forms.

Canna indica, commonly called Indian shot or canna lily, is a rhizomatous, herbaceous perennial valued for bold, tropical foliage and long-season blooms. Clumps of upright, cane-like stems carry large, paddle-shaped leaves in green or bronze, with spikes of red to orange (sometimes yellow) flowers from late spring to frost. Native to the tropical Americas, it thrives in heat and moisture and tolerates periodically waterlogged soils, making it useful along pond margins and in rain gardens. Plants typically reach 3–6 feet tall, depending on cultivar and culture. The hard, glossy black seeds inspired the name “Indian shot,” historically used as beads and in percussion instruments. Beyond ornament, the starchy rhizomes are edible (known as achira) and the species is used in constructed wetlands for nutrient uptake. In temperate climates, rhizomes are lifted and stored frost-free for winter. Generally robust and low-maintenance, Canna indica may suffer from leaf rollers, Japanese beetles, and foliar diseases, and is susceptible to certain canna viruses; start with clean stock and practice good sanitation.

Paeonia lactiflora, the Chinese peony, is a long-lived herbaceous perennial valued for its lavish, often fragrant late spring to early summer blooms. Plants form dense clumps 60–90 cm tall with glossy, deeply divided foliage emerging reddish in spring and maturing dark green. Flowers range from single to fully double forms in white, pink, red, and bicolors, borne on sturdy but sometimes top-heavy stems that benefit from discreet support. Thick, tuberous roots store energy, allowing plants to live and flower for decades with minimal disturbance. This species requires a period of winter chill to set buds and thrives in cool to temperate climates with well-drained, fertile soil. Good air circulation and sanitation help prevent botrytis, a common peony ailment. Once established, it is drought-tolerant, deer-resistant, and low-maintenance, provided it receives ample sun and is planted at the correct depth.

Cucurbita moschata is a warm-season, vining species in the squash family famed for butternut-type fruits and many regional landraces called calabaza or ayote. Native to Mesoamerica and the Caribbean basin, it thrives in heat and humidity better than other squashes and shows notable tolerance to pests such as squash vine borer. Plants form long, rambling vines with tendrils, large lobed leaves, and separate male and female trumpet-shaped flowers that rely on bees for pollination. Fruits vary widely in shape and size, though the classic butternut form has a tan rind and dense, deep-orange flesh rich in beta-carotene and sugars, making it excellent for roasting, soups, and storage. Seeds (pepitas) are edible and nutrient-dense. Compared to related species, C. moschata typically stores longer and resists many foliar diseases in warm climates, provided good airflow. It is a heavy feeder that responds to fertile, well-drained soils and consistent moisture. Maturity ranges from 90–120 days, with fruits ready when rinds harden and peduncles cork.

Silybum marianum, commonly known as milk thistle, is a robust annual to biennial in the Asteraceae family, native to the Mediterranean. It forms a striking, spiny rosette of glossy green leaves marbled with distinctive white veins—a hallmark feature. In its second year (or late in the first, in warm climates), it sends up erect, branched stems 1–1.5 m tall bearing purple, thistle-like flower heads encased in sharp, spiny bracts. The seeds (achenes) carry a pappus for wind dispersal and are the source of the hepatoprotective compound silymarin, widely used in herbal medicine. Milk thistle thrives in full sun and lean, well-drained soils, showing notable drought tolerance once established. While non-toxic and even edible after spine removal, its formidable spines can cause mechanical injury, and the species can be invasive where unchecked. It supports pollinators and is relatively pest- and disease-resistant, making it easy to grow in dry, sunny gardens or as a medicinal/ornamental plant in containers.

Datura stramonium, commonly called jimsonweed, is a fast-growing annual in the nightshade family. Erect, branching plants reach 0.5–1.5 m, bearing large, coarsely toothed, ovate leaves and showy, trumpet-shaped, white to pale violet flowers that open toward evening and emit a sweet scent to attract night pollinators. After flowering, spiny, golf-ball-sized capsules develop, splitting to release numerous black seeds. A classic ruderal species, it thrives in warm, disturbed, nitrogen-rich soils, from roadsides to farm fields. Although sometimes cultivated for its striking blooms, it self-seeds prolifically and can be invasive. All parts contain potent tropane alkaloids (atropine, hyoscyamine, scopolamine) that can cause severe, even fatal, poisoning; handling with care is essential. It prefers full sun, moderate water, and well-drained, neutral to slightly alkaline substrates. In temperate climates it dies with frost but readily reappears from seed. Native to the Americas and now naturalized worldwide, it has a long, complex ethnobotanical history, but intentional ingestion is extremely dangerous.

Linaria purpurea, commonly called purple toadflax, is a slender, short-lived perennial from the Mediterranean valued for its airy, upright spires of snapdragon-like blooms from early summer into fall. Narrow, blue-green leaves clothe wiry stems that reach 60–100 cm, topped by dozens of small, spurred flowers in violet-purple (and occasional pale pink forms). A magnet for bees and hoverflies, it brings movement and a naturalistic feel to cottage borders, gravel gardens, and cracks in walls or paving. Adapted to lean, well-drained soils, it thrives in sun and tolerates drought once established, yet is surprisingly cold-hardy. Individual plants may be ephemeral, but light self-seeding sustains a colony without becoming troublesome in most gardens; deadheading curbs spread and prolongs bloom. Its vertical, see-through habit weaves well among grasses and other drought-tolerant perennials, needing minimal staking or feeding when given brightness, drainage, and a breezy site. It’s an easy, low-maintenance choice for wildlife-friendly and water-wise plantings.

Phedimus spurius (syn. Sedum spurium) is a hardy, mat-forming succulent in the stonecrop family (Crassulaceae), prized as a low-maintenance groundcover. Native to the Caucasus region, it spreads via prostrate, rooting stems to form dense carpets of fleshy, opposite leaves arranged in two rows—hence the common name. Leaves are scalloped near the tips and often flush red or bronze in strong sun or cool weather. In early to mid-summer, branched clusters of starry, five-petaled flowers in shades of pink to deep rose hover above the foliage, attracting pollinators. Typically 2–4 inches (5–10 cm) tall, it can spread 12–24 inches (30–60 cm) or more. Exceptional drought tolerance and a preference for lean, sharply drained soils make it ideal for rock gardens, green roofs, and edging. It remains semi-evergreen in mild climates and is notably cold-hardy, adapting to a wide range of conditions as long as drainage is excellent and watering is restrained.