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1.Inadequate lighting: Roses need at least five hours of direct sunlight each day. Place the plant next to a window or a patio door. If you can't provide direct sunlight, use artificial lighting such as grow lights. Place the lamp directly above your plant no more than 2' away. If the plant isn't getting enough light, the buds will bend over.

2.Overwatering: Yellow leaves are a good indicator. Feel the surface of the soil: if it is dry, or the pot feels light when you lift it, water. If the soil is even slightly damp, don't water. Never allow roses to stand in water. Use a "humidity tray" (made by placing gravel in the saucer) to keep the roots out of standing water.
Fertilize each time you water, using a product specifically formulated for roses. Apply the fertilizer full strength when the roses are in bud. Once the plants are in full bloom, apply the fertilizer at one-half strength, according to label directions.

Once the saucer is full of water, empty it.


3.Allowing roses to become pot-bound: Roses hate being root-bound, so repot them within four weeks of bringing them home. Choose a clay pot one inch larger than the original container, and make sure it has a drainage hole in the bottom. Cover the hole with a pottery shard or a piece of plastic window screen to keep the potting soil from washing out. Remove the rose from the old container, and loosen the roots at the bottom. Place some all-purpose potting mix in the bottom of the new pot. Set the rose in the pot to check the depth. Make sure to leave room for watering. Once the depth is right, fill in around the root ball with more potting soil. Water to settle the soil. Withhold fertilizer for a week or two to prevent burning new root growth.