Ornamental · Montiaceae
Lewisia
Lewisia cotyledon
Give it sharp drainage and a dry crown, and lewisia crowns its rosette with bright flowers each spring.
Partial sun
Every 7–14 days
USDA 4–8
6–12 in · 15–30 cm
Overview
Lewisia is an evergreen rock-garden plant that hails from the mountains of western North America, where it roots into gravelly crevices on cool, well-drained slopes. It makes a tidy rosette of thick, fleshy leaves, then throws up airy sprays of flowers come late spring. And the colors? Warm pinks, apricots, oranges, and yellows, a lot of them with fine candy stripes running through the petals.
The whole plant is basically built for life on a rocky ledge. Those fleshy leaves store water for the dry spells, and the deep root grabs hold of thin, gritty ground that would leave a fussier plant starving. That's exactly why it can't stand wet feet, so give it the sharp drainage of its native scree instead of the rich, damp bed most flowers go for.
Grow it in a trough, a raised rock garden, or sideways in a wall crevice, and it'll stick around for years. It's hardy and long-lived, and it shrugs off hard winters down to its rated zones, but it does want a careful hand with water. Get the drainage sorted, and honestly, the rest is easy.
Care
The short version: pop lewisia into gritty, sharply drained soil with the crown sitting high and dry, give it bright light with some afternoon shade where summers run hot, and water at the base only once the top of the soil's dried out.
Light
Lewisia does best in bright light with afternoon shade, especially where summers get hot. It'll take full sun in cooler spots and put up with part shade just fine, but hot afternoon sun on an exposed site can scorch the rosette, so give it a break in the heat.
Water
Water at the base only, and never into the center of the rosette, because standing water there rots the crown fast. Let the top of the soil dry out between drinks, which usually works out to every 7 to 14 days, and back right off during summer dormancy.
Soil
Plant it in gritty, sharply drained soil made from gravel and sand, sort of like a mountain scree. A pH from 5.5 to 7.0 keeps it happy, and the one thing it just won't forgive is heavy, wet ground that traps water around the roots.
Temperature
This is a tough little thing, riding out cold down to -4°F (-20°C) and handling warmth up to about 75°F (24°C). Heat past that is the real worry, so give it cool roots and afternoon shade when summer turns hot.
Humidity
At heart it's a low-humidity plant, right at home in dry mountain air. Damp, stagnant conditions just invite rot, so airflow around the crown matters way more than any moisture in the air.
Feeding
Feed it lightly in spring and early summer with a dilute, low-nitrogen balanced fertilizer. Rich feeding pushes soft, sappy growth that rots easily, so go sparing rather than heavy-handed.
Pruning
Snip off the spent flower stems once the blooms fade, and pull away any withered outer leaves so rot can't get a foothold. No hard pruning needed here, it's just a bit of light tidying rather than a real cutback.
Repotting
Repot it every 2 to 3 years, or sooner if the rosette's crowding its pot, and do it in early spring into fresh gritty mix. Set the crown at or just above the soil line, and take roots out the drainage holes or weaker flowering as your cue.
Size & spacing
Expect a compact plant around 6 to 12 inches (15 to 30 cm) tall and about 8 to 12 inches (20 to 30 cm) across. Being small and slow-growing, it's a natural for troughs, crevices, and the front edge of a rock garden.
When to plant
Lewisia's a hardy perennial for zones 4 through 8, so it settles in for the long haul instead of racing through one season. Set young plants out in spring once you can work the ground, and then watch for the rosette to send up its flowers from late spring into early summer.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Harvest: Late spring to early summer
Hardiness
USDA hardiness zones: 4–8
Temperature: down to -34°C
Troubleshooting
Just about every lewisia problem comes back to one thing: water sitting where it shouldn't. Keep an eye on the crown and the fresh growth, since that's where trouble tends to turn up first. Spot it early and you can usually set it right.
The rosette's gone floppy and the crown looks brown and mushy
What you're seeing is crown rot, and it shows up when water sits in the middle of the rosette or the soil just won't dry out. Once the neck turns soft and starts to smell, that plant's usually a goner. So water at the base only, tuck grit and a gravel collar around the crown, and if the ground stays damp, lift the plant onto a slope where it can drain.
Fix:
- Stop overhead watering and water only at the base
- Improve drainage by adding grit and a gravel collar
- Lift and replant on a slope or crevice if soil stays wet
- Remove badly rotted plants to prevent spread
Sticky, twisted new leaves with little bugs bunched up on them
Those tiny soft-bodied bugs huddled on the new leaves and flower stems? They're aphids, and that sticky coating is the honeydew they leave behind. A gentle stream of water at the base knocks most of them off, and if they keep coming back, insecticidal soap sorts them out. And here's a bonus: invite ladybirds in and they'll happily do the hunting for you.
Fix:
- Rinse off with a gentle stream of water at the base
- Apply insecticidal soap if persistent
- Encourage natural predators such as ladybirds
Toxicity
Good news if you've got pets or kids at home: lewisia is not toxic. The genus has a long food history, and the related bitterroot was dug up and eaten for generations, so a stray nibble is nothing to stress about. The worst a curious pet might get? A mild stomach upset from overdoing any plant.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats None
Cats are fine around it. A curious nibble won't poison one, though eating a lot of any plant can leave a sensitive stomach unsettled.
Dogs None
There's nothing here to worry a dog. Chew a leaf or dig at the crown and the worst you'd expect is a mild tummy upset, not anything dangerous.
Horses Safe
Horses can graze around lewisia with nothing to fear, since it's got no compounds known to hurt them.
Rabbits Safe
Rabbits can munch the fleshy leaves without harm, but keep an eye out, because they might strip a young rosette faster than it can recover.
Livestock Safe
Cattle, goats, and sheep can wander past it on the rock garden without any poisoning risk at all.
Birds Safe
Garden birds and backyard poultry can peck at the leaves or seed and come to no harm.
People Safe
People are safe too, since the genus has a long food history, with the related bitterroot root dug up and eaten for generations.
Varieties
Most garden lewisias are forms of Lewisia cotyledon, sold as seed strains or named hybrids. A handful are well worth tracking down by name.
Sunset Group / Sunset Strain
It's a seed strain that hands you warm colors all over the map, from orange and apricot to pink and yellow.
'Elise'
This one's a compact F1 hybrid that flowers fast from seed and keeps the reblooms coming through the season.
var. heckneri
You'll know this natural variety by the toothed, wavy edges running along its rosette leaves.
How to propagate
Want more lewisia? You can raise it from seed or split off the little rosettes it makes on its own. Neither route is quick, but both are dependable as long as you keep the mix gritty and go light on the moisture.
SeedModerate
Sow fresh seed in autumn or late winter; benefits from cold stratification · 1-2 years to flowering size
Scatter fresh seed over a gritty mix in autumn or late winter and keep it cool, because a cold spell is what wakes the seed up and gives you better germination. Then comes the patient part, since the seedlings need 1 to 2 years to reach flowering size.
Offsets & pupsModerate
Spring or early summer once side rosettes form · Several weeks to root, full establishment in one season
Once side rosettes pop up in spring or early summer, twist one off with a little sliver of crown attached and let the cut dry for a few hours. Pop it into barely moist gritty mix, and it'll root within a few weeks and settle in fully over a single season.
Myths
Lewisia is a desert succulent that wants hot, dry, baking conditions.
Easy mistake to make, right? The leaves are fleshy and it does need sharp drainage, so it looks the part. But it's really an alpine rock-crevice plant that likes cool roots and a bit of afternoon shade wherever summers get hot. Bake it in dry heat and it'll sulk or die instead of thriving.