My vines haven't bloomed and they are 5 years old......what am I doing wrong?
Are they getting at least 4 hours of direct sunlight daily; are they in-ground or in a pot? Getting the moisture level right in a pot is difficult and is one reason for buds appearing but no flower developing. Does the plant look healthy and is it growing well? If you are over-fertilizing, there will be lots of vegetative (green) growth but few, if any, flowers. Make sure you use a slow-release or long-acting, balanced fertilizer in early spring. Lastly, check your plant often for aphids. These tiny sucking insects come in many colors and attack new growth and flower buds.