Crop Rotation Group
Miscellaneous
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Soil
Any reasonably fertile, well drained soil that holds moisture well.
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Position
Full sun.
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Frost tolerant
Yes. Plants die back to the roots in winter.
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Feeding
Not usually required.
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Companions
-
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Spacing
Single Plants: 60cm (1' 11") each way (minimum)
Rows: 60cm (1' 11") with 60cm (1' 11") row gap (minimum)
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Sow and Plant
Set out tubers in spring, planting them 10cm (4 in) deep. Plants grow quite tall, and can be used to shade heat-sensitive neighbors.
Our Garden Planning Tool can produce a personalised calendar of when to sow, plant and harvest for your area.
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Notes
Can be invasive, so use flowers indoors as cut flowers to reduce reseeding.
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Harvesting
Harvest tubers from late autumn as required. Make sure all tubers are removed from soil by end of season.
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Troubleshooting
Powdery mildew often affects plants in late summer, but does not impact yields.
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