Complete Guide to String of Coins Care and Growth

The Sweet Spot

A south or west window with four to six hours of direct sun a day is the gold standard. An unobstructed east window works for the brightest months but usually leaves the vine stretched by late winter. Set the pot right at the glass for most of the year, and pull it back two or three inches in July and August only if leaf edges start to blanche. In a dim apartment, a 14 hour full-spectrum grow light hanging six inches above the crown does the same job. See light for houseplants for the broader picture.

Too Little Light

This is by far the most common indoor problem. A vine kept in medium light stretches between every pair of leaves, the internodes (the gaps along the stem) lengthen, and the new coins come in noticeably smaller and greener. The silvery sheen fades to dull green. The plant will keep growing, but a year later you have a sad sparse rope rather than a dense silver curtain. The fix is brighter light immediately, plus pruning back the stretched section and rooting the tips in the same pot to thicken the crown.

Too Much Light

Almost impossible to achieve indoors in a normal home, but a plant moved straight from a shaded shop window to a bare south-facing summer sill can sunburn on the leaves facing the glass. Watch for a sudden bleached or papery patch on the south-side discs. Harden the plant into stronger sun over two weeks by moving it closer in stages. A faint pink blush at the leaf edges is the happy version of stress and shows the vine is loving life.

Watering Frequency

In spring and summer, water deeply only once the soil is completely dry from top to bottom. For a 5 inch terracotta pot in a sunny window, that lands roughly every 10 to 14 days. A glazed pot, a hanging basket out of direct sun, or a peatier mix stretches the interval out toward three weeks. Push a thin wooden chopstick to the bottom of the pot; if it comes out cool or shaded with damp soil, wait a few more days. See watering houseplants for the broader technique.

In autumn and winter, cut watering hard. A vine kept cool at 50 to 60°F (10 to 15°C) only needs one small drink every four to six weeks. A plant in a warm 70°F (21°C) living room still wants water every three to four weeks to keep the coins plump.

How to Water

Pour room-temperature water around the base of the crown until it drains freely out of the pot, wait ten minutes, then tip out the saucer. Never let the pot stand in water. The leaves themselves do not mind the occasional splash, unlike an Echeveria, so an overhead rinse to clear dust is fine on a sunny morning when the leaves will dry quickly. Bottom watering is a clean option for hanging baskets, since lifting the pot down for a soak in the kitchen sink is easier than reaching up with a watering can.

Signs of Trouble

A thirsty vine starts flattening the coins. Healthy leaves are domed and slightly puffy; under-watered leaves go flat and the edges curl in just a touch. One deep water plumps them back up within two or three days. An overwatered vine looks the opposite: lower leaves go translucent yellow, then mushy, then drop with a wet plop. By the time the base of the main stem feels soft, root rot has climbed into the crown and the rescue is to take healthy tip cuttings and start over.

What the Soil Needs

A mix that drains in seconds, dries fully within a week, and holds very little water against the roots. Xerosicyos danguyi grows in limestone-rich sandy soil in southwest Madagascar, so the natural substrate is sharp mineral grit with a thin smear of organic matter. Aim to recreate that. Slightly alkaline pH is fine; you do not need to chase a specific number.

DIY Soil Mix

• 1 part standard cactus and succulent mix
• 1 part coarse pumice (or perlite)
• 1 part coarse horticultural sand or fine gravel

Squeeze a damp handful of the finished mix; it should fall apart the instant you open your fingers. If it holds together as a clump, add more pumice. The same recipe works beautifully for a Burro's Tail, a Jade Plant, an Echeveria, or a String of Bananas sitting on the same shelf.

Pre-Made Options

Most bagged "cactus and succulent" mixes from a garden center are still too peaty for a Xerosicyos straight out of the bag. Cut them 50/50 with pumice or perlite before potting. Skip anything advertised as "moisture-retentive" or "premium" with added compost; those bags are pitched at general houseplants and will hold the roots too wet for a desert vine. See repotting for the broader picture.

When and How Often

Feed only during active growth, from mid spring to late summer. Two or three feedings a year is plenty: one in late May, one in early July, and an optional last one in mid August. Skip the rest of the year, and never feed a freshly repotted plant for the first two months.

What to Use

Use a low-nitrogen cactus and succulent fertilizer (around 2-7-7 or 5-10-10) at half the label strength. Water with plain water first, then apply the diluted feed to damp soil. A quarter-strength liquid kelp works just as well as a gentle organic option. See fertilizing houseplants for general dilution guidance.

Over-Fertilizing Signs

A white crust on the soil surface or around the pot rim means salt build-up. Flush the pot with two or three pot volumes of plain water, skip the next planned feeding, and dilute further next time. New stems growing with very long internodes and oversized soft green coins are the early warning that you are pushing the plant too hard.

Ideal Range

Through spring, summer, and autumn, aim for 65 to 85°F (18 to 29°C). Normal indoor temperatures are fine, and a hot south windowsill in July is welcome as long as you have hardened the plant into stronger sun first. The vine tolerates brief outdoor drops to around 35°F (2°C) if completely dry at the root, but indoor plants should never see below 50°F (10°C) for long.

Drafts and Heat Sources

A light winter rest at 50 to 60°F (10 to 15°C) for six to eight weeks keeps the vine tight and triggers blooming on mature outdoor plants. An unheated bright porch, a cool spare room, or a windowsill behind a thermal curtain all work. Avoid cold drafts from open doors in winter, and keep the pot a clear foot away from any working radiator, because the dry blast shrivels the lowest leaves and dries the soil unevenly.

Ideal Humidity

Comfortable in normal household humidity, anywhere from 30 to 45 percent. No misting, no humidifier, no pebble trays, and absolutely no closed terrariums. The whole point of the thick silvery coins is to thrive in dry air, so anything that holds humidity above 60 percent for long is a real problem indoors.

Easy Humidity Boosters

You almost never need any. The only humidity-related risk is a damp, cool, still corner in late autumn before the heating kicks in, when stagnant air at low temperatures invites fungal spotting at the leaf joints. A small clip-on fan running a few hours a day prevents it. Skip steamy bathrooms unless they have a strong extractor and a bright window, and keep the vine away from kitchen sinks where rising steam settles on the leaves.

What the Flowers Look Like

Small clusters of half-inch yellow-green star-shaped flowers on short stalks at the leaf axils, with male and female flowers on separate plants (the species is dioecious, like a kiwi vine). The display is interesting botanically but visually unremarkable, and even outdoor plants in California or Florida need a few years of strong sun before they bother to flower.

How to Trigger Bloom

Honestly, do not bother indoors. The conditions that nudge a vine toward blooming are very strong direct sun for at least eight months of the year, a cool dry winter rest, and a plant at least three years old and well over four feet of vine length. If you live in USDA zones 10 to 11 and the vine spends the summer on a sunny patio, you may get a quiet show. Everyone else, grow it for the silver coins and let the bloom be a happy surprise if it ever happens.

If It Won't Bloom

Almost no indoor String of Coins ever flowers, and that is the normal outcome. The plant is grown for its foliage and its climbing habit, not its blossoms. If a non-flowering plant bothers you, pick a reliable succulent bloomer like Echeveria instead.

Xerosicyos danguyi (the standard form)

The classic String of Coins. Round flat silvery blue-green leaves an inch to an inch and a half across, growing in alternate pairs along thick green-grey stems, with small curling tendrils at the leaf axils that grip onto whatever they can find. Vines reach 10 to 15 feet over years if allowed to climb. Slow to moderate grower, easy to propagate, very long-lived.

Xerosicyos perrieri

A close relative sometimes sold under the same common name. The leaves are slightly more oval and a touch greener, the vine is more slender, and the plant is a little fussier about strong light. Care is otherwise identical. Less common in cultivation than X. danguyi.

Xerosicyos pubescens

A truly rare collector species with fuzzy leaves and a thick swollen caudex (a fat water-storing base). It is more a caudiciform succulent than a vine and is grown almost as a bonsai. If you spot one, expect a triple-digit price tag and a slow growth pace; care follows the same low-water, high-light rules.

Common Look-Alikes Worth Knowing

The flat coin shape gets confused with two other plants on a shop shelf. The String of Nickels (Dischidia nummularia) hangs much smaller bright green discs from a delicate epiphytic vine and wants a totally different care routine, with bark instead of grit and higher humidity. The Silver Dollar Vine label is also sometimes pinned to Crassula arborescens, a shrubby jade relative with similar silvery round leaves on an upright stem rather than a vine. Always check the scientific name on the tag before you buy.

Good Shelf Companions

A String of Coins looks best alongside other trailing or climbing succulents with different leaf shapes. A String of Pearls gives round green beads at a smaller scale. A String of Bananas brings curving green crescents. A String of Dolphins adds a quirky silhouette. A Burro's Tail drops a thick green-grey cascade that contrasts the flat silver coins beautifully. A Jade Plant or a single mature Echeveria anchors the group with an upright shape. Stick to matching terracotta or stoneware pots so the leaf shapes themselves stay the focus.

When to Repot

A String of Coins is a slow to moderate grower and prefers to be snug. Repot every two to three years, or only when the roots have fully filled the pot and you can see them curling out of the drainage hole. Spring or early summer is the best window. Avoid repotting in autumn or winter unless you are rescuing a plant from rotted soil.

Choosing a Pot

A small terracotta pot one inch wider than the current one is the gold standard. Clay wicks moisture out of the mix and shortens the drying time, which protects the roots through any winter watering mistakes. For a vine you want to hang, pick a shallow plastic hanging basket with strong drainage holes and a clip-on saucer that you can remove to drain. The root system is fairly compact, so a wide shallow pot is better than a tall narrow one. At least one drainage hole, no exceptions.

Step-by-Step Repotting

Let the soil dry completely for a week first; the root ball loosens cleanly when bone dry. Tip the plant onto your palm, gently tease away the spent soil, and inspect the roots for any soft brown patches. Trim those off with sterilised scissors. Settle the crown into fresh dry gritty mix at the same depth as before, then arrange the vines so they hang or climb the way you want them. Top-dress with a layer of pale gravel or fine pumice if you like, and then leave the plant bone dry for a full week before the first cautious water. That short dry pause is what stops opportunistic root rot from setting in through any cuts you made during the repot.

When to Prune

Spring and early summer are best, when the plant is in active growth and cuts heal fast. Prune any time you see a vine that is far longer than the rest, has lost its leaves on a long bare section, or has stretched from low light. Snip the vine back to just above a healthy pair of leaves, and the cut node will usually push a new branch within a few weeks.

How to Prune

Use sterilised, sharp blades. Wipe the blade with rubbing alcohol before and between cuts. Snip cleanly through the green stem about a quarter-inch above a leaf node; the plant will branch from that node. Save every cutting for propagation. A single pair of leaves with a node is enough to start a new plant, and a well-pruned vine often gives you a dozen free plants in one session.

Pinching for Bushiness

Pinch the growing tip of any vine that is getting too long. The plant responds to tip pinching by branching laterally at the next node down, which is the easiest way to turn a single sparse vine into a dense silver curtain. Do this once a season on every active vine for the first two years and you will end up with a much fuller plant than one that has been left to its own devices.

Best Method

Stem cuttings are the only reliable route. Single-leaf propagation does not work for Xerosicyos (unlike Echeveria or Jade Plant), because a coin without a stem node has nothing to grow from. Water rooting works too, but soil rooting is faster and the resulting plant transitions to dry soil more smoothly. See succulent propagation for the broader principles.

Step-by-Step Propagation

Snip a healthy vine into segments four to six inches long, with at least two pairs of leaves each. Cut just below a leaf node. Strip the lowest pair of leaves off so you have a bare half-inch of stem at the bottom. Set the cuttings on dry kitchen paper in a shaded warm spot for two to three days until the cut end calluses over. Push the calloused ends about half an inch deep into dry gritty mix, three or four cuttings to a small pot for a fuller look. Place in bright indirect light, and from the second week onward, water lightly once a week. New roots form within two to three weeks, and new growth appears at the top within five to six weeks. Once new leaves emerge, move the pot back into stronger direct sun.

Tips for Success

The single biggest mistake is rooting the cuttings in soft potting mix instead of grit; soft soil holds the cut end wet and the stem rots before it roots. The second biggest mistake is skipping the callus step and pushing fresh cuttings straight into damp soil. Three dry days on a paper towel is a tiny pause that almost guarantees success. If you want to root in water instead, suspend the cutting so only the bare stem dips in, change the water weekly, and pot the cutting into grit as soon as the first roots reach an inch long; longer water roots sulk when they hit dry mix.

Solo Setups

For a trailing display, a hanging basket near a sunny window is the classic look. Let the vines hang in single long strands rather than tangling them, since the coin pattern reads best as a clear line. A wide low pot with a few stems draping over the rim is just as striking on a windowsill. For a climbing display, set a small bamboo trellis or wire form into the pot and gently weave the youngest vines around it; the tendrils will take over the job within a few weeks.

Grouped Arrangements

In a tall plant shelf, pair a climbing String of Coins on the lowest level with trailing companions above so the silver discs frame an emerald cascade. A String of Pearls, a String of Bananas, or a Burro's Tail work beautifully in this role. On a sunny windowsill, line up the coin vine in a small terracotta pot beside a sturdy Jade Plant and a chalky Echeveria for a clean trio of leaf shapes (flat disc, paddle, rosette). Keep the pots and the surface tones matching so the foliage stays the focus.

Where Not to Put It

Skip steamy bathrooms without strong extractors, dark hallways, sealed glass terrariums, and any spot more than four feet from a bright window. A closed terrarium is a death trap for this plant, since still humid air against the silvery leaves invites fungal spotting within weeks. Anywhere a leaky window drips in winter or a humidifier mists nearby is also off limits.