Prunus avium Seeds | Rainier Cherry Tree
LATIN NAME: Prunus avium
COMMON NAME: Rainier Cherry
Plant Profile
A ‘Rainier’ tree is a vigorous sweet-cherry with white five-petalled blossom in early spring and fruit that ripens to a yellow ground flushed rose-red, with pale, sweet flesh that is low in acid. The cherries are large and thin-skinned, which is why they fetch a premium and bruise more easily than darker sorts. They need a polliniser of a different sweet-cherry variety because the tree is not self-fruitful on its own.
‘Rainier’ cherries are eaten fresh at their best, chilled and straight from the bowl, because the thin skin and low acid make cooking less kind to them than to firmer dark sorts. They also dry and freeze acceptably when the crop is large, and they sit well on a cheese board alongside a hard alpine style. The sweetness means a little goes a long way in a dessert.
The fruit makes a pale, delicate preserve and a light cherry syrup, and it pairs with almond, vanilla and dark chocolate without the tannic bite of sour cherries. A few folded into sparkling wine make a simple summer glass, and the flavour holds up better than expected when barely warmed. Keep the sugar low so the variety’s own sweetness shows.
A ‘Rainier’ needs a different sweet-cherry variety blooming at the same time as its polliniser, and the early blossom is vulnerable to late frost, so site the tree on a slope or where cold air drains away. A second compatible tree nearby also improves set and size. Bees do the transfer, so avoid spraying while they are flying.
Science & Biotechnology
The red blush of the skin comes from anthocyanin pigments, chiefly cyanidin glycosides, the same family that colours most dark cherries and berries. The yellow ground of ‘Rainier’ means less pigment overall than a black cherry, which is why the flesh stays pale and the flavour reads sweet rather than tart. These pigments are studied for their antioxidant interest, though the eating is the point in the garden.
As with all stone fruit, the kernel inside the pit contains amygdalin, a cyanogenic glycoside that can release cyanide if the seed is crushed and eaten, so the stone is discarded rather than chewed. The flesh and skin are safe and sweet; only the inner seed carries the compound, which is a standard caution for the whole Prunus genus. Birds and mammals that swallow pits whole pass them without issue.
Uses & Benefits
‘Rainier’ was developed by Harold Fogle at Washington State University and introduced in 1960, named for Mount Rainier that dominates the skyline of the cherry-growing region. It was selected for colour, size and sugar, and it inherited the firm flesh of ‘Bing’ with a milder, lower-acid flavour all its own. The variety remains protected by the kind of plant-breeding history that makes the fruit a label rather than a wild type.
Sweet cherries do not breed true from seed, so the embryo in a ‘Rainier’ pit carries a mix of its parents’ genes and almost none of the careful selection that defines the cultivar. A seedling may grow into a healthy tree and even bear cherries, but the fruit will not match the label in size, colour or sugar. Commercial orchards therefore graft ‘Rainier’ scion wood onto a chosen rootstock and never plant the pit to get the variety back.
Growing from Seed
If you do sow the pit, clean it, crack the dormancy with a cool moist rest and sow in a free-draining mix; the result is a seedling suited to grafting or to growing as an ornamental wild cherry. Do not expect the fruit to be ‘Rainier’, and label it honestly as a seedling. Most home growers buy a grafted tree for any serious crop.
Young trees want full sun, a deep loam and steady water through fruit swell, with a balanced feed in spring and again after harvest. Thin crowded fruitlets by hand when they are small so the remaining cherries size up instead of crowding. A trunk guard protects the bark from sun scald and gnawing in the first winters.
Our Take
For anyone exploring sweet cherries, Prunus avium seed gives the species, while Prunus mahaleb is a classic rootstock and Prunus mume an early ornamental relative. Prunus persica rounds out the stone-fruit family.
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