Blueray is a cold-hardy highbush blueberry that earned its reputation as a Michigan State University winner in the late 1970s by delivering outsized berries with exceptional sweetness across a remarkable range of climates. Hardy in zones 3 through 8, this compact shrub reaches 4 to 6 feet tall and produces extra-large, dark-blue berries that don't crack, making it reliable whether you're gardening through cold winters or hot summers. The plants begin producing fruit in 2 to 3 years and continue yielding heavily for at least a decade, with pink spring blossoms giving way to scarlet fall foliage that makes the plant ornamental year-round.
48
Full Sun
Moderate
3-8
72in H x 48in W
—
High
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Blueray delivers truly exceptional berry size paired with a sweetness that stands out among highbush varieties, all wrapped in an upright, open plant that fits compact growing spaces. Its cold-hardiness extends through zone 3, yet it thrives equally well in hotter summers, making it one of the few blueberries genuinely adapted to shifting climates. The plant serves double duty as its own pollinator while also working as a pollinator for most other blueberry varieties, giving you flexibility in garden planning.
Blueray is grown primarily for fresh eating, where its extra-large berries and sweet flavor make them a standout choice for eating straight from the bush or adding to bowls. The fruit's resistance to cracking also makes it suitable for storage and transport, allowing fresh berries to be enjoyed or preserved well beyond the harvest season.
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Transplant Blueray blueberries into prepared, acidic soil in early spring. Ensure the soil pH is 4.5 to 5.5 before planting, and space plants 4 feet apart to accommodate mature width. Water thoroughly after transplanting to settle the soil.
Blueray ripens in July and continues into August, with berries reaching a deep blue-black color when fully ripe. Pick berries when they are fully dark blue and slightly soft to the touch; underripe berries won't fully develop their sweetness. The plant produces abundant yields, so plan to harvest multiple times throughout the season as berries mature on the cluster.
Blueray's open, upright growth habit benefits from light pruning to maintain shape and encourage air circulation, though the variety doesn't require aggressive pruning. Remove any crossing or inward-growing branches to keep the canopy open and accessible for harvesting.
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“Blueray emerged from Michigan State University's breeding program and was introduced in 1941, but didn't become widely available until the late 1970s when gardeners began discovering its exceptional combination of size, flavor, and climate adaptability. The variety represents a deliberate effort to create a northern highbush hybrid capable of thriving across diverse growing regions without sacrificing the quality and yield that home gardeners demand. Since its release, it has become a standard in cold-climate berry gardens, proving its staying power across decades of cultivation.”