The color has long been associated with love, and the different shades of red offer symbolism for different strengths of love.One of the most common problems with roses is that they break while they are growing, and this is largely in part due to the fact of how delicate most roses are. Bush roses more than any other types of roses have problems, especially with disease and mildew.
A person giving a dozen or more red roses may be saying how much they love the other person, while by giving of one red rose, the message may be they love them, but are not willing to spend a bundle to show it. However, it should be known that correct cultural practices can really help to prevent many of the disease problems that can occur with roses, and so you want to make sure that you are as informed and knowledgeable in this area as you possibly can be.
A large bouquet of Valentine roses can also include deep pink, which would show gratitude or light pink to symbolize devotion, admiration or even sympathy. For one, in regards to traditional treatment, you are going to want to make sure that you spray any vulnerable roses with garden sulfur fungicide as directed on the label during their dominant period in early spring, and you also want to make sure that you check their growing tips and check all the young leaves for any signs of fungal disease, particularly when temperatures hit the mid 60s and when rainfall is especially sparse.
Lavender, or lilac roses are said to mean love at first sight and that the sender is enthralled by the person while yellow roses symbolize a platonic relationship or a meaning of friendship.
As long as you are aware of all the different problems that can occur with your roses as well as how to take care of each problem, then you should have no troubles, and your roses should be able to live for an incredibly long time.