How to Care for Cut Dendrobian Orchid Blossoms in a Planter

Plant Dendrobium orchids in a well-draining potting medium such as medium grade fir bark. Add 1 part orchid mix for every 10 parts fir bark if the planter is less than 6 inches across. Water Dendrobium orchids only when the potting medium is completely dry.

Place Dendrobium orchids directly under a shelter. These plants grow best with direct sunlight in the morning and afternoon, but they need protection from sun in the middle of the day. The leaves turn yellow when they receive too much direct sunlight and turn dark green when they don't get enough light.

Keep Dendrobium orchids outside when the temperature during the day is above room temperature but less than 85 degrees Fahrenheit. Bring the plant indoors when the temperature drops below 60 degrees Fahrenheit at night.

Apply a total of 1 tsp. of 25-9-9 fertilizer each month throughout the year. Divide the 1 tsp. of fertilizer per month into multiple servings during the month to avoid overfertilizing Dendrobium orchids.

Repot Dendrobium orchids when they become pot-bound, usually every other year. Repot these plants immediately if the potting medium gets infested with mold or the planter stops draining well. The best time to repot Dendrobium orchids is just after they bloom.