Yesterday I visited 2 blackberry farms. One of the farms has a "Shift Trellis." This type of trellis is moved to different positions through the season. In the spring before buds break it is placed in a horizontal position so the fruiting laterals grow toward the sun, all on the same side of the canopy. Once the fruit has set, the trellis is shifted to about a one o'clock position, so the fruit faces the afternoon sun. Here is a picture of the fruit in the green stage.
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