Blackberries and raspberries produce an aggregate fruit with individual pistils that form drupelets. Both blackberries and raspberries are self fertile so you only need one of each. If you are growing all the same variety of raspberry, your plants will have a fruit crop. Could I have help with identifying some suitable blackberry varieties to cross the raspberry with and guidance on how to pollinate? You will need to leave a space at least 2-3 metres wide just for the blackberry. Raspberries and blackberries need full sun and well-drained soil that's rich in organic matter to stay healthy and at peak performance. Any cross-pollination that could occur would not be an issue unless you saved the resulting seeds, planted them and then grew the plants. It is only when you plant the seeds do you see a change. There are indications that crop yield and quality might benefit from cross-pollination. Apply 4 to 5 pounds of fertilizer per 100-foot row of raspberries. Blackberry shrubs are a trailing or upright plant – commonly cultivated for its tasty aggregate fruit. Berries were true to form. Raspberries do best with a balanced 10-10-10 fertilizer spread in a 2-foot band around the plant. Raspberry Blackberry Cross. To learn more about how our team naturally cross-pollinates berry plants , we sat down with Jessica Gilbert, Driscoll’s Molecular Blueberry Breeder , to learn more about how she and her team breed only the finest berries. Even if they cross the berries will be the same. Pollination. In terms of pollination, some blackberry plants are able to self-pollinate, while others require cross-pollination to set fruit. Most raspberry varieties are self-pollinating (or self-fertile), meaning your raspberry plants will fruit when they mature, without requiring the availability of another raspberry variety’s pollen. You may want to plant the blueberries between the raspberries and blackberries though because the pests that love raspberries love blackberries, so by having a … As I'm expanding my fruit, I have no choice but to get them closer and closer. I know it isn't for cross pollination, because you need a seperation of 2 miles, taking into consideration the travel distance of honey bees. Just remember, when you are planting them that the blackberry is pretty "violent" when it grows. In this study, the effects of artificial self- and cross-pollination were studied in 15 strawberry and 6 red raspberry cultivars grown in a protected environment in a greenhouse. In general, trailing blackberries require cross-pollination while upright blackberries are able to self-pollinate. Or, you could use seperation tenting. A number of cane varieties are hybrids between blackberries and raspberries, but this is not an issue for the home gardener. Raspberry and blackberry cultivars range from completely self-fruitful to completely self-unfruitful with most erect blackberries being fruitful yet prostrate growing cultivars often requiring cross-pollination. The answer: we naturally cross-pollinate plants, and a lot of them. Kathy Ann, It is likely your Fall Gold was mislabeled or died out. But … Blackberry fruit is borne on the current year’s growth with usually 10–20 flowers per cluster. To obtain a large, well-formed berry, most of the individual pistils in an inflorescence must be pollinated. Asked May 25, 2016, 9:11 PM EDT. Cross-Pollination. Four strawberry cultivars benefited from cross-pollination and one required it. I didn't find a clearcut reason listed for the 700 ft. distance. I live in northern Virginia and would like to develop a blackberry raspberry cross starting with the local wild red raspberry (Rubus Idaeus). 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