|I have raspberries in a raised bed, watered by a drip system. I started the bed last year from bare root stock. I'm getting a reasonable crop of berries, but noticed that the leaves on some of the smaller canes, particularly those at the perimeter of the bed are turning yellow. I have not fertilized at all this year per instructions.
|Raspberry plants have perennial roots and biennial canes. If the canes in question are in their second season, they may be dying back naturally. You can dig one of the canes up to inspect the roots. Look for creamy-colored roots (break one in half) If the roots are brown and shriveled, they may be diseased or suffering from a lack of water, or even a root rot from too much water. If the roots look healthy, then the cane is just doing what comes naturally and can be cut back to ground level.