Posted: Yesterday at 18:03
It's not the companies being awkward - when plants are available depends on their life cycle.
Winter-flowering pansies are in the shops already, and some will be in flower or have pictures on the labels so you can see what you're getting. Don't know about primroses/primulas but I'm sur you can buy them soon. They normally flower in early spring but I daresay the breeders have made them do so earlier.
Wallflowers are biennials - they'll have been sown early this summer and are normally planted out now-ish to flower next spring. Again, you may be able to find earlier-flowering ones.
If you have a good local garden centre or nursery (i.e. one without a coffee shop or overpriced presents) you may find a knowledgeable nurseryman who can show you what's available.