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This type of cactus is relatively fast-growing and keeps its cute rounded shape. They can grow up to five feet tall outdoors, though they make a fun windowsill plant indoors. Give it full sun, and ...
The plants that bear such flowers can be tall, columnar, and sometimes extremely large and tree-like, but more frequently are thin-stemmed climbers. While some night-blooming cereus are grown indoors in homes or greenhouses in colder climates, most plants are too large or ungainly for this treatment and are only found outdoors in tropical areas.
[citation needed] Cryptochromes are photoreceptors that absorb blue/ UV-A light, and they help control the circadian rhythm in plants and timing of flowering. Phytochromes are photoreceptors that sense red/far-red light, but they also absorb blue light; they can control flowering in adult plants and the germination of seeds, among other things.
Cereus are shrubby or treelike, often attaining great heights (C. hexagonus, C. lamprospermus, C. trigonodendron up to 15 metres or 49 feet). Most stems are angled or distinctly ribbed, ribs 3–14 centimetres (1 + 1 ⁄ 4 – 5 + 1 ⁄ 2 inches) long, usually well developed and have large areoles, usually bearing spines.
Indoors, you may need to supplement natural sunlight with an LED grow light. Insufficient light will cause your plant to get long and stretchy-looking instead of developing its cute bunny-shaped form.
The seeds of many Australian plants and plants from southern Africa and the American west require smoke or fire to germinate. Some plant species, including many trees, do not produce seeds until they reach maturity, which may take many years. Seeds can be difficult to acquire, and some plants do not produce seed at all.
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