Dyckias are characterized by clustering rosettes oftough, succulent leaves, usually with vicious spines. Some ofthe 100 species have green leaves, but most have dense coverings of scales that make the foliage gray-green to silvery white. In nature, plants typically grow on rocks in sunny, semiarid habitats. Small, bright orange or yellow flowers are borne on tall, unbranched spikes .
LIGHT. Most species need very high light, at least 5000 footcandles. The species with leaves that look white such as D. fosteriana and D. marnier-Iapostolle can take full sun even in the desert. They can probably acclimate to hot, sunny windows. TEMPERATURE. Ideal temperature is in the high 80soF/low 30soC or higher during the summer. Growth will be normal but slow at lower temperatures. Many are hardy to at least 15°F/-9°C. AIR. Follow basic culture. WATERING. Contrary to what one might expect from their appearance, these plants love water. They will tolerate months of drought, but most species receive plentiful water during the growing season. One cultural practice is to place the pots in shallow trays of water during the summer. Bottom watering is especially useful when a plant fills the pot so tightly that top watering is difficult. Water qualitY does not seem to be important. Hard water neither spots the leaves nor harms the plants in any other way. Water that is high in salts, though, should probably be avoided on general principles. POTTING. Dyckias, being true terrestrials, can tolerate heavier potting mixes than most other bromeliads. Use either the same mix as for other bromeliads, or a cactus/succulent mix. FEEDING. No special requirements. They respond with more vigorous growth to fertilizer and the plant form does not suffer as long as there is adequate light. PROPAGATION. Propagation is not technically difficult but can be a physical ordeal for the grower because of the terrible spines. Use of gloves and a chisel are recommended. Offsets of some species are difficult to establish and may take months or longer to regain vigor. It is best not to divide plants until absolutely necessary.