Not all houseplants require soil; some can grow in a jar of water. The water provides nutrients the plant needs, the jar supports the plant and the plant uses oxygen that dissolves into the water. Gravel, pebbles and rocks can also support the plants. Do not use tap or distilled water to fill the jar. Allow water to sit for 24 hours so chlorine in the water evaporates or purchase chlorine-neutralising drops. Change the water every week.
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Dumb cane (Dieffenbachia) plants are tropical plants with patterned leaves. They are popular low maintenance houseplants because they tolerate low light conditions. The plants can grow up to 5 feet tall. Add pebbles to the jar it grows in to prevent the plant from toppling over. Transplant the plant into a larger jar and add more pebbles to support it as it grows.
Philodendron (Philodendron oxycardium) prefers bright lighting but perform well in shade or the low lighting found indoors. The heart shaped leaves form along rapidly growing vines. Provide support for the vines. Periodically prune the plant to maintain a lush appearance.
The most popular plant to grow in a jar of water is the peace lily. Peace lilies (Spathiphyllum) need very little sunlight to survive and produce their signature white flower. This plant cleans indoor air of contaminants such as benzene and formaldehyde. Place a plastic dish that has had an opening cut into the bottom into the mouth of the jar to support the plant. Add a betta fish. The plant roots provide the betta with nutrients and the betta excrement provides nutrients for the plant.
Ivy is yet another plant that grows in a jar of water. According to the National Aeronautics and Space Administration (NASA), ivy is considered an air scrubbing plant; it cleans and improves indoor air quality. Prune the ends of ivy plant vines so they do not become top heavy and fall out of the jar.
Lucky bamboo grows for an indefinite period in a jar of water. Fill the vase up, at least halfway, with pebbles to support the bamboo stem. Red roots will form and weave throughout the pebbles. Transplant bamboo plants into a larger jar as they grow taller.
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