The most exciting thing a gardener can achieve is to grow flowers from seed.
It seems so amazing that a beautiful flower can grow from what appears to be a small, brown (usually), dried up granule.
Whatever flowers you are into, check out Unwins Seeds, which sell hundreds of different varieties of flower seeds that are available nationwide from garden centres.
Growing from seed is easy. Every packet has detailed instructions to guide you through the stages.
Most seeds require warmth and moisture to germinate, some require light and cold stimulation. It is a good idea to invest about £20 or so in a heated propagator to get them started early enough so that they flower in the same season.