If your kimono have wisteria design on it, you can wear it only during the wisteria season.
Some people who are particular about kimono are thinking to wear wisteria kimono after wisteria have bloomed is not smart.
They say after wisteria have bloomed, we have to hand over leading part to real wisteria.
Because wisteria on kimono never surpass real wisteria.
I think it's possibly too much to say, but it's very fashionable to catch seasons in advance with kimono, and entirely getting seasons away is unfashionable.
Flower is a symbol of seasons.
And Japanese people are very careful of seasons of kimono.
So, you can't find a summer kimono having winter flower, at least as an antique.
(Today, there are some kimono of wrong seasons, especially as Yukata.)
Also, there is kimono that you can wear at plural seasons.
□ Foreign (not Japanese origin) flowers.
You can wear rose kimono in all seasons, because rose is foreign flower and it didn't exist in the times when kimono customs was grown.
Some people say even if it's a foreign flower, it have to match with season.
But I don't think you necessarily have to do so.
□ Some seasonal flowers or plants.
For example, a kimono that have all of peony (spring), bell-flower (summer), red-leaves (autumn) and camellia (winter).
□ Fanciful flowers.
Some flower looks like camellia, but not camellia.
Some flower looks like peony & rose got married.
□ Not flowers or plants.
Geometrical patterns like checkered pattern or stripes.
Dolls, treasures, Chinese & Japanese characters, and so on.
□ Auspicious designs, ancient pattern.
Shochikubai (Japanese pine + bamboo + Ume-blossom (Japanese plum)), Shikunshi (Japanese pine + bamboo + chrysanthemum + orchid), Japanese crane, turtle, Tachibana, Aoi-mon (hollyhock-leaf's pattern) etc..
Generally, "picture" of cherry-blossom is for spring only but "pattern" of cherry-blossom can be worn in all seasons.
Some people say that cherry-blossom is Japanese symbol and cherry-blossom kimono can be worn in all seasons.
Recently, people are becoming not wearing kimono, and non-seasonal kimono is increasing to wear it for all seasons.
Most of Japanese people don't want to have a lot of kimono of each season.
Furthermore, you have to match up kimono, obi and accessories to same season.
You can't wear autumnal-tints kimono and cherry-blossom obi together.
Strictly speaking, of course you can do it, but it's not cool.
Maybe you feel these rules are troublesome.
I agree it! But don't think so seriously.
Ume-blossom symbolize spring in Japan.
Japanese people can wear Ume-blossom kimono in only spring.
But if it doesn't grow up or have meaning in your country,
you can wear it in all seasons, I guess. I wish you match up kimono and obi,
but don't need to match up to real seasons so closely in your country.
In Japan, there are a lot of faultfinding madam and specialist of kimono, and they sometimes point out small mistakes of young people.
Though they are good teacher, they also are obstruction of wearing kimono easyly.
And quite a few Japanese young people are shrinking away to wearing kimono.
But your country doesn't have them.
You can wear kimono very carefreely.
Thinking about kimono's season is not only bother but also interesting and fun.
I hope your kimono-life will be more delightful with seasons!
Please try and enjoy it easyly!