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Pampas Grass in Zone 5: Hardiness and Blooming

Pampas grass (Cortaderia) is marginal in Zone 5. Only 'Pumila' dwarf is rated Z5. Others are Z6. Mulch heavily with hay, don't cut back until spring. Blooms take 2-3 years. Fertilize with Osmocote. Use B1/SuperThrive in fall for root growth.

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