Crassula perforata aka String Of Buttons

Crassula perforata is a moderately fast-growing succulent reaching about 1–2 ft (0.3–0.6 m) tall and 2–3 ft (0.6–0.9 m) wide at maturity, with stems that start erect and become trailing as they elongate. NC State Extension describes its growth rate as rapid, particularly in bright light with proper watering. The trailing habit develops naturally with age, making mature plants ideal for hanging baskets or cascading over container edges.

Crassula perforata is hardy in USDA zones 9–12 and is not frost tolerant; NC State Extension recommends bringing it indoors before temperatures drop to 32°F (0°C). It thrives in warm, subtropical conditions matching its South African origin. In cooler climates, grow it as a container or houseplant year-round, or move it outside only during frost-free months.

The species produces a long, slender inflorescence carrying many tiny, star-shaped flowers with pale yellow to cream petals and tubular corollas with brown-to-red sepals. NC State Extension notes the flowers are fragrant and held in rounded clusters. Bloom time is reported as November–April in native South Africa and as spring under Northern Hemisphere cultivation; the elongated inflorescence is the key trait separating it from the closely related Crassula rupestris.

Plants of the World Online recognizes two accepted subspecies: Crassula perforata subsp. perforata and Crassula perforata subsp. kougaensis (van Jaarsv. & A.E.van Wyk). The species is closely related to and sometimes confused with Crassula rupestris, but C. perforata can be distinguished by its long inflorescence of cream flowers (vs. the dense, rounded, bracted inflorescence of C. rupestris) and by its later flowering season.

Outdoors, Crassula perforata grows best in USDA zones 9–12 in full sun to partial shade, with protection from intense midday heat in hot climates. It needs a well-drained substrate (loam-and-sand mix or cactus mix) and is adaptable to acid, neutral, or alkaline pH. In its native South African range it grows on rocky slopes and in thicket vegetation under a subtropical climate, and the species is not frost-hardy.

NC State Extension classifies Crassula perforata as a low-maintenance plant. Pruning is typically optional and used to control its trailing habit, encourage branching, or remove woody, leggy stems; cuttings can be reused for propagation rather than discarded.

NC State Extension recommends a well-drained cactus mix for containers. Repot when the plant becomes pot-bound or the substrate breaks down, generally in spring as active growth resumes; allow soil to dry before and after repotting to reduce root rot risk.

Crassula perforata propagates readily from division, offsets, and leaf cuttings, according to NC State Extension. As with most Crassula, allow cuttings to callus for a day or two before placing them on dry, well-drained succulent mix to root.

Yellowing in Crassula perforata most often signals overwatering and incipient root rot or fungal disease, which NC State Extension lists among its main problems. Allow the soil to dry completely between waterings and check that the container drains freely.

NC State Extension links brown, scorched, or shriveled foliage to two main causes: sunburn from excessive direct sun (especially intense midday sun in hot climates) and leaf shriveling from underwatering. Move the plant out of harsh midday sun and water deeply on a soak-and-dry schedule to address both.

Long, drooping or prostrate stems are part of the natural growth habit of Crassula perforata: NC State Extension describes the plant as initially erect, with stems becoming woody and prostrate as they elongate, making it well suited to hanging baskets. Sudden softness or collapse is more often a sign of overwatering and root rot.

Crassula perforata is normally a rapid grower according to NC State Extension. Slow growth typically points to insufficient light, underwatering, or a depleted substrate; move the plant to brighter conditions, water on a soak-and-dry schedule, and consider repotting into fresh cactus mix.

NC State Extension lists mealybugs, vine weevils, and aphids as the main pests of Crassula perforata, and root rot and fungal disease (linked to overwatering) as the main diseases. Other common issues include sunburn from excessive direct sun and leaf shriveling from inadequate water. Use a well-drained substrate, water on a soak-and-dry schedule, and inspect leaf axils where mealybugs hide.

NC State Extension records that Crassula perforata flowers attract butterflies and hummingbirds, indicating insect-mediated (and likely some bird-mediated) pollination in cultivation; small Crassula flowers are typically insect-pollinated in the wild.

NC State Extension notes that the small, star-shaped flowers of Crassula perforata are fragrant. The succulent foliage itself is not noted as scented, and the plant is grown more for its sculptural stacked-leaf form than for fragrance.

With its straightforward care requirements, String Of Buttons is a hassle-free plant that anyone can enjoy.

String Of Buttons’s native range is South Africa.

String Of Buttons does best in dry soil and should only be watered sparingly.

The String Of Buttons is very susceptible to soil that is too wet, so it's essential to choose a potting soil that drains well and does not retain excessive moisture. A soil mix that includes plenty of perlite or vermiculite for drainage and some organic matter for nutrition is ideal. You can easily create this type of soil by adding a few handfuls of perlite to regular cactus soil from the store.

String Of Buttons requires abundant, bright and direct light. Placing it less than one foot from a window is the best way to make sure the plant receives enough light to survive and thrive. Depending on your region, however, the current weather can affect the placement of the plant in your home. For example, in some areas the sun may be too direct and intense, so it's best to place it farther away from the window. You may also need to adjust your placement according to the season as the sunlight can change intensity over the course of the year. If you live in a region with significant temperature fluctuations, such as a desert, you may need to place the plant a bit farther away from the window to avoid extreme heat or cold. With some care and attention, your Concertina Plant will be sure to bring you many years of beauty and enjoyment.

String Of Buttons prefers dry environments, but by misting the plant or providing extra humidity, water will linger on the leaves and create an ideal environment for fungi that could be harmful.

The String Of Buttons is known for its slow growth and doesn't require fertilizing beyond its potting soil. Replacing the soil in its pot once a year should offer it sufficient nutrition. It's essential to remember that plants get their energy from the sun, not from fertilizers.

No verified data on the toxicity of this plant exists within Ploi's records. Should you, someone in your family, or your pet ingest plant material with an unknown toxicity level, it is recommended to seek medical advice.

During the wintertime, it is common for String Of Buttons plants to go dormant and their growth rate may slow down. Therefore, the amount of waterings should be spaced out more.