Indoor gardeners sometimes choose plants for beautiful color, shapeliness, abundant flowers or other qualities without considering whether the environment in their homesis suitable for successful growth.

Careful evaluation of available light (both duration and quality) is neccessary, as well as attention to other factors involved in care of plants.

Two questions indicating an impulsive choice of plants recently arrived in the mail.

A reader in Alexandria asked for help with her Dracaena marginata, which is turning brown and losing leaves after only six weeks in her bedroom. She asks: What is wrong? What is the best locale? When should it be fed or watered?

A reader in Silver Spring, while on vacation, bought a large Asparagus sprengeri in a hanging basket. After the first week at home it slowly shed needles and continues to turn yellow day by day although she mists it regularly and waters it as need as indicated by a moisture meter. What is wrong? How can she save it?

Dracaena marginata, like any other houseplant, goes through a period of adjustment when removed from a greenhouse or garden center to your home. It is considered a durable houseplant in low light situations, but it will grow best in filtered sunlight. Low light may be supplemented by incandescent lights or a spotlight at leaf level.

Dracaenas like warm temperatures - 60 to 70 degrees at night and warmer in the daytime. They need moist soil at all times, but the pot should not be allowed to stand in water. If the soil dries entirely, the leaves will lose color and sometimes turn brown at the tips or even fall off. Overfeeding and drafts also cause brown leaftips.

Dracaena marginata tends to drop its lower leaves. A home's dry air (in contrast to the humid atmosphere of the greenhouse) accentuates dropping of foliage. Because it drops lower leaves, it grows with a long thin woody trunk. The plant should be turned often so that it will grow erect as it is inclined to lean toward the source of light.

Your Dracaena will rest from October to March, requiring less water during this period, and, under ordinary conditions, no fertilizer. During the summer growing season, use a general purpose houseplant fertilizer, following directions on the container.

The Asparagus sprengeri purchased at a greenhouse and had been growing under the best possible conditions to produce an elegant, large hanging basket plant. Removed to a home, it was immediately subjected to radical changes in light and humidity, as well as to temperature and air circulation differences.

Asparagus sprengeri is very sensitive to low humidity. Misting is inadequate to keep it green. As a hanging plant, it is subject to air circulation, which reduces humidity, and it lacks the benefit derived from close association with other plants, which provide a concentration of moisture in the air form which all benefit.

A large plant can be placed on a pedestal with a pebble tray or saucer. Water kept on the pebbles will evaporate to increase humidity in the immediately surrounding area.

The soil should be kept moist. A large sprengeri may need water two or three times a week when in active growth. When you water, pour tepid water on the soil until it drains from the bottom of the pot; pour off excess after 15 to 20 minutes. Water again only when your moisture meter reads in low range.

Cut off yellowed stalks at soillevel for good grooming. By February or March your plant may be denuded, but at that time new garden spears will begin to appear and you can begin fertilizing and increase watering to restore the plant to its natural beauty.