Light
Medium to bright
Ideal spot
Ctenanthe setosa 'Grey Star' · Foliage plant · pet-safe
Medium to bright
Ideal spot
about weekly
In the growing season
Demanding
Moderate grower
Safe
Cats & dogs
Ctenanthe Grey Star (Ctenanthe setosa 'Grey Star') belongs to the Marantaceae family and is a demanding houseplant to look after. This moderate grower plant is happiest in medium to bright and reaches 40–90 cm indoors.
For watering, the rule is simple: keep evenly moist. In the growing season it needs water roughly every 5 days, dropping to every 8 days in winter. Use the watering calculator below to tune that rhythm to your pot size, light and household humidity.
Good news for pet owners: Ctenanthe Grey Star is listed as non-toxic to cats and dogs by the ASPCA.
Set your pot size, light and humidity — the calculator tunes the watering rhythm to your home.
Light at the spot
Humidity
Season
Water Ctenanthe Grey Star
every 5 days
≈ about weekly · 6× per month
Let the top 2–3 cm dry and finger-check before watering again.
Ctenanthe Grey Star prefers medium to bright but will cope with medium, indirect. Harsh midday sun can scorch sensitive leaves, while too little light leads to leggy, sparse growth.
Keep Ctenanthe Grey Star between 18–26 °C and aim for around 70% humidity (55% minimum). Below 13 °C it risks cold damage — keep it away from draughty windows and radiators.
18–26 °C
Not below 13 °C
70%
55% minimum
Keep evenly moist
Soil between waterings
Pot Ctenanthe Grey Star in peat-free, moisture-retentive mix that never dries out fully. A drainage hole is essential — soggy, airless soil is the single most common way houseplants die.
Listed as non-toxic to cats and dogs by the ASPCA — a genuinely pet-safe choice.
The best ways to propagate Ctenanthe Grey Star are division. Late spring and summer are ideal, when the plant is growing most actively.
Prayer plants fold their leaves upward at dusk and lower them at dawn — a daily rhythm called nyctinasty, driven by water pressure in a hinge at the leaf base.
In the growing season Ctenanthe Grey Star needs watering about weekly (about every 5 days in a 16 cm pot at medium light), and much less in winter — roughly every 8 days. Use the watering calculator above to get the exact interval for your conditions.
Ctenanthe Grey Star thrives in medium to bright. A spot near a bright window out of harsh midday sun is ideal; give it a little more light in winter.
Ctenanthe Grey Star is non-toxic to pets. Listed as non-toxic to cats and dogs by the ASPCA — a genuinely pet-safe choice.
The most common problem with Ctenanthe Grey Star is crispy leaf edges. Check your watering and drainage first — most issues trace back to too much or too little water.
The best ways to propagate Ctenanthe Grey Star are division. Late spring and summer are ideal, when the plant is growing most actively.
Indoors Ctenanthe Grey Star typically reaches 40–90 cm. With the right light and occasional repotting it stays compact and bushy.
Care data last verified on 15 June 2026.
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