Rattlesnake Plant
Long, wavy-edged leaves in pale green with dark green blotches like a snake's markings, and deep purple undersides. The toughest of the calatheas, pet-safe, and the one to start with if you want the pattern without the drama.
Rattlesnake plant is the calathea that forgives. The leaves are long and narrow with rippled edges, light green painted with dark green ovals in two neat rows, and flipped over they are a rich wine purple. It grows upright to about two feet and, like all its family, folds its leaves up at night.
Where a Calathea orbifolia or white fusion sulks at the first dry day, insignis just carries on. It still wants humidity and soft water, but it tolerates a missed watering and an ordinary living room far better than its relatives. If you have killed a calathea before, start again here.
Light
Medium, indirect light. A north window is ideal, an east window good, and it copes a few feet back from a west one. Direct sun bleaches the pattern and burns the leaves within an afternoon. Low light slows it but does not kill it.
Water
Keep the soil lightly moist. Water when the top inch is dry, roughly every five days in summer and every eight in winter, and let the excess drain. Use filtered, distilled or rain water; tap water minerals brown the leaf edges over time. Do not let it sit in a saucer of water.
Soil and potting
A peat-free, moisture-holding mix with perlite for air: potting soil with coco coir and a third perlite. Pot with drainage. Repot every eighteen months in spring, one size up, and divide the clump at the same time if it has outgrown the pot.
Feeding
Quarter-strength balanced feed every four weeks in spring and summer. Calatheas burn easily; less is more.
Propagation
Division only. Unpot in spring, tease the rhizome clump apart into sections with roots and leaves, and pot each up. Keep the divisions warm and humid for a few weeks.
In a hot, dry home
Doable, and the best calathea for it. It wants fifty-five percent humidity, which a dry house will not give it, so group it with other plants on a pebble tray or run a humidifier through summer. Keep it far from the AC vent and water more often than you think, checking the top inch every couple of days in July. Filtered water matters more here, where tap water is hard.
Problems and fixes
Brown crispy leaf edges
Likely cause: Dry air or tap water minerals
Fix: Raise humidity and switch to filtered water.
Leaves curling into tubes
Likely cause: Thirsty or too hot
Fix: Water, and move it out of a warm draft.
Yellow lower leaves
Likely cause: Overwatering
Fix: Let the top inch dry; check drainage.
Pattern fading, pale leaves
Likely cause: Too much light
Fix: Move it to a north or east window.
Rattlesnake Plant questions
Is the rattlesnake plant safe for cats and dogs?
Yes. All calatheas are non-toxic to pets.
Why do the leaves move?
Prayer plants raise their leaves at night and lower them by day, tracking light. A rustling plant in the evening is normal.
Is it easier than other calatheas?
Yes, noticeably. It tolerates dry spells and ordinary humidity better than orbifolia, white fusion or makoyana.
