Care instructions are included with your planter. Please read them. Above all, don't over water, this is the most common cause of dead plants.
In early spring plants are dormant. They will appear dull in color and have some dry edges. This is normal and when placed in sunlight they will intensify in color. some plants change color with the seasons and each variety has its own most colorful time of the year.
Light: Most varieties need at least half a day to a full day of sunlight. In extremely hot areas some afternoon shade is recommended.
Soil: Succulents need good draining soil. When topping soil, you can purchase cactus soil or incorporate sand, gravel or volcanic rock for better drainage.
Watering: Allow the soil to dry slightly between waterings. Succulents don't like to have wet feet. When you do water, water thoroughly.
Fertilizer: Most succulents need very little fertilizer. Watering with a well balanced fertilizer once a month will be all they need.
Flowering: Sedums all have different bloom times and colors ranging from pink, red and yellow. Sempervivums will bloom after the second or third year. A flower stalk will shoot up from the center of the main rosette with a cluster of flowers. After the flower dies, gently twist off the stalk. The main rosette has put on new offsets that will fill in. With a wide variety of bloom times there is always something with color.