Malus baccata Seeds | Siberian Crabapple
LATIN NAME: Malus baccata
COMMON NAME: Siberian Crabapple
Plant Profile
The tree is small and rounded, rarely more than 8 m, with a stout trunk and a dense head of slender, arching branches. Its native range runs across the continental interior, so the provenances that survive worst-case cold are those from the coldest districts; a plant raised from seed collected further south will be noticeably more tender.
The fruit is a pome roughly a centimetre across, red to yellow, carried in clusters on long stalks. Unlike the larger crabapples, the fruit persists on the tree into deep winter, and in cold districts it is eaten by waxwings, fieldfares and thrushes long after every other fruit is gone.
In older orchard literature the species appears as a dwarfing to semi-dwarfing rootstock for cold regions, valued both for hardiness and for its tolerance of light, dry soils. It also contributes cold tolerance when used as a parent in breeding programmes alongside the dessert apples.
Crabapples generally carry better resistance than dessert apples to scab and to fire blight, and Malus baccata has been screened as a parent for exactly those traits. Breeders use it not for eating quality but for the durability it passes into progeny.
In spring the tree covers itself in white blossom that opens with the leaves and fills with bees; in autumn the small fruit hangs alongside yellowing foliage. It is a good small tree for a windy site, a car park edge or a front garden where a standard apple would be too big.
Science & Biotechnology
The fruit is built around phenolic chemistry. Phloridzin, the characteristic phenolic of the apple genus, sits in the skin and the seed, together with chlorogenic acid, quercetin glycosides and cyanidin in the red forms. These compounds give the fruit its drying astringency and its tendency to brown quickly once cut.
The species sits close to the domestic apple in the genus and has been included in comparative genomic work on the group. That closeness is why it grafts so compatibly with orchard cultivars and why it is such a convenient bridge in breeding.
Uses & Benefits
Crabapples are rich in pectin, which is why they are added to low-pectin fruit in jams to make the set. A handful of sliced Siberian crabapples cooked with the main fruit will firm a soft jam without any commercial gelling agent.
Because it flowers heavily and over a long period, the species is sometimes planted at the edge of an orchard block as a pollen source for the main cultivar. Its own fruit is of no commercial interest, but the bees it feeds work the whole block.
Growing from Seed
Clean the seed from ripe fruit in autumn, mix it with moist sand or vermiculite in a sealed bag, and keep it cool and damp through the winter before sowing in a nursery bed. Fresh seed sown straight into a cold frame in autumn works just as well and saves the bagging.
The seed needs a period of cool, damp conditions before it will grow, and the process is unreliable if the material dries out at any point. Label the bag with the collection site: cold provenance is the whole point of growing this species from seed.
Seedlings vary in everything, from fruit size to hardiness, so named forms are propagated by grafting or budding onto a seedling rootstock in late summer. Seed-grown trees will fruit in time, but expect a wide spread of quality, most of it tart and best cooked.
Prune lightly in late winter, removing crossing branches and any shoot with the shepherd’s crook that signals fire blight. Feed sparingly with a general fertiliser in spring and avoid high nitrogen, which produces soft growth the tree cannot harden before cold arrives.
Our Take
I grow this species for its blossom, its winter fruit and the birds it feeds, and I would plant it again in the coldest corner of any plot. Malus offers plenty of other routes: the pink-flowered Malus hupehensis for a larger tree, the double blossom of Malus spectabilis for a showpiece, or Malus coronaria for a fragrant American counterpart. If you are after fruit rather than ornament, start with the dependable Red Fuji apple.
Related Reading
Gardeners who grow Siberian Crabapple often pair it with these related subjects: