Don't bother with trying to gather seeds, they won't come true but cuttings are very easy to root in a glass of water. They flower for a long time. They are a tender perennial and don't like frosts much.
Red Rose - I've also had very good luck rooting these in a light soil mix. Take a cutting and dip in a rootone powder and stick in the soil - keep soil from drying out. I usually mist every day or so and water once a week. Don't let the soil dry out completely.
Those baskets are beautiful. Be careful in the summer sun - down here in FLorida my ivy geraniums love the full shade in the summer and will burn up in the hot summer sun - they do very well in fall and winter in sun