What Is the Ideal Temperature Range for penstemon 'Windsor Red'?
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penstemon 'Windsor Red' · Penstemon 'Windsor Red'
Grow in fertile, moist but well-drained soil in full sun or light shade in a position sheltered from frosts and drying winds; in autumn, cut plants down by two-thirds of their height and protect with a dry mulch; for more advice, see penstemon cultivation
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