What is flower bonsai
Flower bonsai are bonsai grown from flowering species, shaped in a pot so that their blooming season becomes the main thing you look forward to. In Japanese they are called hanamono bonsai, the flowering category, and plum, cherry, satsuki azalea, and chojubai quince are typical examples. Not every tree planted in a pot is a bonsai. A bonsai carries the feeling of a large tree from the mountains or the forest inside a small container, and it becomes a bonsai only when growing it and viewing it become one practice. What sets flower bonsai apart is that their finest moment is concentrated into the few days or weeks each year when the flowers open. (Sources Omiya Bonsai Art Museum of Saitama, Azukari internal material Week 1)

Photo by Sarah Stierch, CC BY 4.0, via Wikimedia Commons — Source
Where flower bonsai fit among the types of bonsai
For viewing, bonsai are loosely grouped into five kinds, conifer bonsai, deciduous bonsai, flowering bonsai, fruiting bonsai, and herbaceous bonsai. By species they divide first into the conifers, the evergreen needled trees, and the broadleaf group, which splits further into trees enjoyed for foliage, for flowers, and for fruit. Flower bonsai belong to the flowering group. Around sixty kinds of trees are commonly grown as bonsai in Japan, so flower bonsai are not a novelty but a long established branch of the art. (Sources bonsai-bonsai.com, Omiya Bonsai Art Museum of Saitama)
How flower bonsai differ from conifer bonsai
Conifer bonsai stand at the center of Japanese bonsai culture, built around evergreen needled trees such as black pine, red pine, Japanese white pine, and shimpaku juniper. These hold their green through the year, and you enjoy the bark, the branch structure, and the overall form over a long span. Flower bonsai add a clearly defined highlight to that green presence, because their value gathers around a single season. They also call for care that conifers do not need. You have to know how and where the flower buds form, and ease back on growth during the period when those buds differentiate. The sculptor Fumio Asakura is said to have advised that bonsai are meant to be enjoyed with the seasons, which is why spring and autumn displays suit them. Flower bonsai are exactly this kind of seasonal tree. (Sources bonsai-bonsai.com, Kimi no mini bonsai biyori, Azukari internal material Kokufu exhibition report)
Which flowering species are most common
The main flowering species include satsuki azalea, plum, cherry, flowering crabapple, flowering quince, chojubai, wisteria, azalea, crape myrtle, and camellia. Plum and cherry are the best loved flowers in Japan, and cherry was already admired in the Nara period. Satsuki, in the azalea family, opens varied flowers in color, shape, and size across May and June. Chojubai is a dwarf deciduous tree with finely divided twigs and a strong tendency to bloom in more than one season, carrying small vermilion flowers in spring and autumn. Because it is vigorous and easy to grow, it has long been a favorite. The species you choose decides both the season of bloom and the character of the flower, and that choice is part of the pleasure. (Sources Kimi no mini bonsai biyori, Bonsai Empire entries for plum, cherry, and satsuki, Bonsaimyo on chojubai)

Photo by Sarah Stierch, CC BY 4.0, via Wikimedia Commons — Source
How to manage the season and the flowers
The heart of growing flower bonsai is seasonal care aimed at the bloom. If water and feed run too strong while the flower buds are forming, the tree puts its energy into shoots and leaves and flowers poorly, so this is the time to hold growth back a little. Satsuki, left in shade, stretches its branches and gives fewer flowers, so place it where it catches good morning sun and prune it as soon as the bloom is over. Chojubai tolerates half shade but suffers from drying out, so water it well once the surface soil is dry. A year with a flower bonsai is easiest to picture as an alternation between the seasons of preparing to bloom and the seasons of watching it bloom. (Sources Kimi no mini bonsai biyori, NHK Shumi no Engei on satsuki, Bonsai Q on flowering mini bonsai for beginners)
Where a beginner should start
If this is your first flower bonsai, chojubai or satsuki is a good place to begin. Chojubai is vigorous and blooms across more than one season, giving you many chances to enjoy the flowers. Satsuki is among the easier flowering trees and thickens its trunk readily, which makes it simple to train into a bonsai form. The basic care is watering, pruning, guiding branch direction with wire, and repotting once every few years. None of this is meant to strain the tree. It is done to keep it healthy and beautiful for a long time. Choose your first tree by working back from the season you want to see, satsuki for spring brilliance, or the multi season chojubai if you want flowers over a longer stretch. (Sources Bonsai Q, GardenStory on satsuki, Azukari internal material Week 1)

Photo by Sarah Stierch, CC BY 4.0, via Wikimedia Commons — Source
Flower bonsai and the idea of entrusting a tree
Flower bonsai are beautiful, yet the care for bloom and the season by season management take real effort. For generations, Japanese bonsai artists have thought of a great tree not as something they own outright but as something entrusted to them by those who came before. Azukari reshapes this sense of custody into a form that fits modern life. The tree stays in Japan, an artist and specialists continue its care, and the person who owns it receives the tree's record, its seasonal updates, and a place in the culture. The guiding idea is that ownership does not have to mean keeping a thing at hand. For someone who wants a flowering tree but cannot take on the bloom management alone, custody is a practical path. A good starting point is to ask which you value more, the hands on work of growing or the long relationship with a tree. You can see individual trees by species on the Azukari marketplace. (Sources Azukari internal material Post 01, Sunday Azukari 3)
Frequently asked questions
How do flower bonsai differ from ordinary bonsai. Technically they are the same craft, but flowering trees are viewed for their bloom and add care aimed at producing flowers. Can a beginner really get them to flower. Choose a tough, easy species such as chojubai or satsuki, give it sun and steady water, and prune soon after the bloom, and you can often enjoy flowers in the first year. Can they be grown entirely indoors. Most flowering trees need outdoor sun and the warmth and cold of the seasons, so the workable approach is to grow them outdoors and bring them in only for the few days of bloom.
If you would like a seasonal tree on terms that fit your life, you can start by getting to know the trees and the model at Azukari. See flower bonsai at Azukari