How to Grow Ice Crystals
Wikimedia Commons
Ice Crystals
Mesembryanthemum crystallinum
herbIce Crystals, also known as ice plant, is a succulent herb with fleshy leaves covered in distinctive, glistening crystalline structures that resemble ice or salt crystals. These salt glands give the plant its unique appearance and slightly salty flavor, making it popular as a culinary garnish and novelty vegetable. The plant produces small, pale pink or white flowers and thrives in hot, sunny conditions.
When should you plant Ice Crystals in your zone?
Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.
Example Ice Crystals timeline · Pittsburgh, PA (Zone 6b)
-
Plant Ice Crystals
Around Apr 17Near Pittsburgh's average last spring frost.
-
Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
-
Harvest Ice Crystals
Around Jun 6≈ 50 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Ice Crystals dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Zones 9-12; grows as annual elsewhere
Sign up free to see if Ice Crystals grows in your zone — and get a personalized planting timeline.
Get my Ice Crystals timeline →Growth Stages
Seedling
2-3 weeksTiny green shoots emerge with small, fleshy cotyledons; crystalline structures begin forming on leaf surfaces.
Keep soil lightly moist until established; provide bright light; maintain warm temperatures (70°F+). Avoid overwatering.
Vegetative
3-4 weeksPlant develops bushy, spreading growth habit with increasingly prominent fleshy leaves covered in prominent salt-like crystals.
Reduce watering frequency; allow soil to dry between waterings. Fertilize sparingly with diluted, low-nitrogen fertilizer. Full sun exposure intensifies crystal formation.
Flowering
3-4 weeksSmall, delicate pale pink or white flowers appear among the foliage; plant reaches mature size.
Continue minimal watering; flowers attract pollinators. Dead-head spent flowers to encourage continued blooming and leaf production.
Fruiting
4-6 weeksFlowers fade, and seed capsules develop; leaves remain thick and crystalline.
Allow some flowers to remain for seed production if desired. Continue dry conditions. Seeds mature for 4-6 weeks.
Harvest-Ready
Ongoing until frost or plant senescenceLeaves are fully developed, crisp, and heavily coated with crystals; plant is at peak flavor and texture.
Harvest regularly to promote bushier growth and continuous leaf production. Plant remains productive for 3-4 months in favorable conditions.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
-
Spray with water or insecticidal soap; ensure good air circulation; mist occasionally in dry climates
-
Remove with alcohol-soaked cotton swab; spray with neem oil or insecticidal soap if infestation is severe
-
Prune heavily infested stems; spray with horticultural oil or neem oil
-
Allow soil to dry out more between waterings; use sticky traps; improve drainage
Uses
Gourmet Garnish & Salad Green
CulinaryIce plant leaves add a unique crunchy texture and mild, slightly salty flavor to salads, sushi, appetizers, and fine dining presentations. The crystalline structures make it visually striking on plates. [source]
Salt Substitute
CulinaryThe plant's natural salt crystals provide seasoning without added sodium chloride, making it useful for low-sodium cooking and salt-conscious cuisines. [source]
Traditional Wellness
MedicinalIce plant has been used in traditional Mediterranean and South African medicine for its potential diuretic and anti-inflammatory properties, though scientific evidence is limited. [source]
Ornamental & Container Plant
HouseholdIts unusual crystalline appearance and low maintenance make it an excellent novelty houseplant or container plant for sunny windowsills and drought-tolerant gardens. [source]
Pollinator Support
WildlifeThe delicate flowers attract bees, butterflies, and other pollinators, supporting local ecosystems while providing visual interest. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Harvest leaves continuously once plant is 4-6 weeks old by pinching off tender young leaves and stems. Leaves are best when fresh and crisp; harvest in the morning for peak texture. Cut just above leaf nodes to encourage bushier growth. Can harvest for 3-4 months before plant declines. Entire young plants can be harvested as greens.
Fun Facts
- 🌱 Ice Crystals are native to South Africa and thrive in hyper-arid environments; the crystalline structures are actually specialized salt glands (hydathodes) that excrete excess salt from the plant's tissues.
- 🌱 The plant is halophytic, meaning it can grow in high-salt soils where most plants would die, making it potentially valuable for reclaiming saline agricultural land.
- 🌱 In the Mediterranean and Middle East, ice plant has been cultivated for thousands of years and was historically used as a source of potash for glass-making by burning the plant biomass.
Join 30,000 gardeners planning their gardens with LizPlants.
Get your personalized Ice Crystals planting timeline
Tell us your zip code and we'll calculate exactly when to start Ice Crystals seeds, transplant seedlings, and harvest — based on your USDA zone and local frost dates. Includes calendar reminders and printable task lists. Free to start.
Get my Ice Crystals timeline →