Cascade Blackberry is a storied hybrid that bridges the gap between two berry worlds: the intensely flavored native Pacific Northwest blackberry (Rubus ursinus) and the beloved Loganberry. First introduced in 1940, this variety nearly vanished from cultivation but remains unforgotten by gardeners who remember its unmatched wild trailing blackberry flavor combined with larger berries and exceptional productivity. Hardy in zones 7 through 9, it grows to about 8 feet tall on thin, trailing canes best suited to trellising. This early-blooming variety produces fruit in July and thrives in maritime climates where its disease resistance and moderate water needs make it a low-fuss addition to the garden.
Full Sun
Moderate
7-9
96in H x ?in W
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High
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Cascade Blackberry carries a distinctive wild flavor that home gardeners have sought for decades, a direct inheritance from its native blackberry parent that loganberries alone cannot match. The thin, trailing canes require trellising to stay manageable, but this habit also means easier harvesting and better air circulation around the fruit. Its documented success in Pacific Northwest maritime gardens and proven disease resistance make it a smart choice for regions where humidity and dampness challenge other brambles. The 1940s origin story adds real historical weight: this wasn't a lab experiment but a practical cross born from a real need to marry the flavor of wild foraged berries with the productivity of cultivated ones.
Cascade Blackberry is grown primarily for fresh eating, where its distinctive wild berry flavor shines unadorned. The larger berries compared to its wild parent make it practical for jam and preserve making, capturing that intense native blackberry character in a form that's easier to harvest and process than foraged berries. Its proven performance in maritime climates and heritage status mean it's also valued by gardeners in the Pacific Northwest who view it as part of regional berry culture and preservation of pre-industrial fruit varieties.
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Start seeds indoors at temperatures between 60 and 70 degrees Fahrenheit. Cascade Blackberry seeds benefit from stratification (a period of cold moist treatment) to improve germination; refrigerate moistened seeds for 30 days before sowing. Sow on the soil surface or barely covered and maintain consistent moisture without waterlogging. Seedlings typically emerge within 2 to 3 weeks at the warmer end of the range.
Transplant seedlings outdoors after the last frost date in your zone, once nighttime temperatures reliably stay above 40 degrees Fahrenheit. Harden off plants by gradually exposing them to outdoor conditions over 7 to 10 days. Space plants 4 to 6 feet apart in a location receiving full sun. The soil should be prepared to a pH of 5.5 to 6.8 with good drainage; amend with compost or peat moss if your native soil runs too alkaline.
Pick Cascade Blackberries in July when they reach full black color and come away from the core with gentle pressure; the berries should feel slightly soft rather than rock-hard. The best flavor develops fully ripe berries, so taste one from each cluster to confirm ripeness before harvesting the rest. Wear gloves and long sleeves, as the canes carry thorns despite their thin habit. Pick every two to three days at peak season to encourage continued fruiting and to harvest berries at their absolute peak flavor.
Cascade Blackberry's thin, trailing canes require structured support through trellising rather than heavy pruning. Train the new first-year canes horizontally along the trellis wires to encourage even fruiting and easier picking. After harvest in July, remove the canes that have produced fruit, as blackberries fruit on second-year wood; this rejuvenation pruning opens the plant to light and air. Cut away any weak, diseased, or tangled canes in early spring before growth resumes. The constant renewal of canes and systematic removal of spent wood keeps the plant vigorous and prevents it from becoming an impenetrable tangle.
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“Cascade Blackberry emerged in 1940 as an intentional cross between two very different parents: the Rubus ursinus, the small but extraordinarily flavorful blackberry native to the Pacific Northwest, and the Loganberry, then wildly popular for its larger size and productivity. The cross aimed to capture the best of both, creating a berry with the wild complexity of the native species but in larger quantities and bigger fruits. For decades, it became a standard backyard crop throughout its native region, a fixture in the gardens of people who understood that truly exceptional flavor was worth the extra tending. Over time, it largely disappeared from commercial cultivation and seed catalogs, but the berry never truly left the memory of those who tasted it; gardeners and nurseries continue to request it specifically because of what sets it apart from modern varieties.”