Helianthus angustifolius |
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View think listPlant type: herbaceous rhizomatous soft-wooded perennial Hardiness zones: 6-10 Sunlight: hot overhead sun Soil Moisture: constantly moist to usually boggy Soil: ordinary soil, enriched soil, sand, clay, mildly acidic to mildly alkaline Tolerances: moderate wind, second line salt wind, light frost |
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Pests: Susceptible to powdery and downy mildews, canker, rust, fungal leaf spots, caterpillars, spittle bugs, cutworms, beetles and weevils. Pruning: Cut stems back hard after flowering. Tip prune in early summer to encourage branching and flowering. | ||||||||
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