Caring for your Phalaenopsis

An orchid is not some sort of exotic, and difficult to grow plant.  Orchids have traditionally been grown by specialty growers, producing flowers for the cut flower trade or plants for the collectors.

During the last few years more growers now produce select groups of orchids, in sufficient quantities. This commitment to grow these wonderful and attractive bloomers make these plants more available, and affordable.

Many nurseries and garden centers now carry orchids on a regular basis. Some of this orchid "group" includes oncidiums, dendrobiums, and phalaenopsis.


As with most flowering plants orchids "show off" in their own blooming season. During the months of December through May is the season for phalaenopsis commonly known as the "moth orchid". They are beginning to hit the stores and before you go out an purchase one, we want to provide some general care information.

General Care

Growing a Phalaenopsis Orchid in your home can be rewarding and fun. It is particularly well suited for the conditions you already find at home. Phalaenopsis hybrids flowers range is size from 2" to nearly 5" in diameter.

Colors range includes white, pinks, lavender and yellow in both solid colors and mixes of stripes and spots. Many new a bold color pattern are beginning to show up also. Phalaenopsis flowers offer both exotic form and superb longevity. Individual blooms can last as long as 3 months. Flowers open sequentially at 2-5 day intervals along an arching spike.

Light

In the home, Phalaenopsis orchids enjoy a spot near or in a bright window. You’ll want to avoid direct mid-day sun but early morning or late afternoon sun is great. An east or west facing window is ideal. In darker or cloudy environments a shaded southern window might be best.
You can supplement normal light with fluorescent lights placed approximately 1 foot above your orchid. Time your lights to simulate normal day length. If you have a home greenhouse you should consider using a heavy shade cloth (especially during the summer) to limit light levels to 1,000 – 1,500 foot candles.

Temperature

The ideal temperatures for the Phals range between 55 and 85 F. For ideal growing try to maintain 60 at night and between 75  and 80 during the day.

Cool night time temperatures in the fall encourage flower spike initiation. However, once the flower spike is developed, wide swings in temperature can cause unopened bud to drop off. Temperatures in excess of 90 can slow growth.
Phalaenopsis also benefit from moderate humidity levels. Ideal levels range between 50 and 75% relative humidity. In a heated home you will want to set your plants on a shallow tray filled with gravel and water. This should help to keep the humidity near your orchid at acceptable levels. Make sure that the plants roots are NOT sitting in water.

Water

Moth orchids do not like to be dry to the point of wilting. They should be watered thoroughly and then not again until the media is nearly, but not completely, dry.

How often you water will depend on the type of media your orchid is growing in and its growing environment. Once every week to 10 days is a good starting point.
In winter, with the heat on in your home, lower humidity will mean you’ll water more frequently. Don’t let your plants dry to the point of wilting – it will really set them back.
Remember to not get any water on the flowers as this will shorten their longevity.

Fertilizer

For convenience, a slow release fertilizer with equal proportions of N-P-K (14-14-14) used as directed, can work very well. If you prefer to use a liquid plant food, again with equal parts of N-P-K, apply it at recommended rate every second time you water.
During blooming season you might consider a blooming plant formula with elevated phosphorus levels (i.e. 10-30-20). During winter months you can reduce liquid fertilizer applications to once a month.
I would recommend staying away from feeding altogether while the plant is flowering.