A standard tree rose must always be staked for the weight of the rose, especially when in flower could cause its brittle stem to bend and snap. A wooden stake is the best. Strap the stem to the stake with purpose made ties and guide the spacer, usually part of the tie, between the stem and the stake to prevent rubbing.
A weeping standard will need to have its branches trained. There are a couple of methods for doing this. One is to purchase an umbrella cage. These are usually metal and can be fixed to the top of the stake. The umbrella consists of a band of metal in the shape of an umbrella. The arching branches can be tucked under it and tied in place if necessary the flowers allowed to peer through.
Alternatively, use soft garden string tied to the branches and pull them downwards, attaching the other end of the string to the stake. The look that is achieved is far more natural.
It is true that some shrub roses can be a bit lax and floppy in growth and will often spill over. The answer is to either prune them hard or support them, unless you like the manner in which they are growing and have a big enough garden to accommodate them. There are several ways of giving these roses the support they need. An obelisk or wigwam made from wood can work nicely. Place the structure over the rose, then tie the branches to it from within to allow the flowers to protrude through. Alternatively, a ring or a square support on legs can be placed around the plant whilst it is still small enough to take it, the branches are then encouraged to tumble over it. Another rather attractive method is to peg the branches down. As they become long enough pull the arching branches to the floor and simply peg them there using pegs rather like tent pegs. Obviously the garden needs to be big enough to take this method, but the naturally created fountains will become fountains of flower when the roses are in bloom, for they will be encouraged along the whole length of the stem. Many of the Bourbons and Hybrid Perpetuals are ideal for this method of training. This ‘pegged down’ rose will look fabulous when it comes into bloom.