How Long Will Orchids Last Immersed in Water?

Cutting Orchids

• Ensuring a long life for orchids immersed in water begins with the cut. Cut orchid stems while they are in water. Make the cut at an angle on the stem to create as large an opening as possible for the water to enter into the plant. Remove at least a 1/4 inch from the bottom of the stem. Place longer stemmed orchids in narrow, tall vases.

Water Conditions

• A clean vase and warm water -- 100 degrees Fahrenheit -- will help to maintain a cut orchid's beauty. The website Orchids for Beginners recommends combining one can of carbonated lemon soda, the same amount of water and 1 tsp. of bleach. The soda will maintain low pH and feed the flowers with sugar and the bleach will allow the stem to absorb water by killing bacteria. Change the water every three days.

Temperature and Air

• Orchids fare better at cooler temperatures and out of direct sunlight. Place orchids away from circulating dry heat and air. Keep the flowers in a cool area. Orchids for Beginners suggests putting your orchids in the refrigerator when you are not at home to extend their life.

Maintenance and Life Span

• With some basic maintenance, cut orchids in water can last from a week to six weeks, depending on the variety. Cymbidium may last four to six weeks; paphiopedilum can last up to two weeks; and cattleya will adorn a room for up to seven days, according to Beautiful Orchids. Refresh slightly wilted orchids by immersing them in warm water for several minutes before arranging in display water.