Fortnight Lily
Dietes
These irislike plants with fans of stiff, narrow evergreen leaves form dense, long-lasting clumps. The...
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Fortnight Lily
Dietes grandiflora
From South Africa. This is a somewhat taller (up to 3 ft.), larger version of D. iridioides a...
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Fountain Bamboo
Fargesia rufa
Grows in a narrow, fountain-like clump 6-8 ft. tall (eventually 12 to 15 ft.). Stems 1/2 in. wide, lea...
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Fountain Grass
Pennisetum
Growing in fountainlike mounds, these are among the most graceful of ornamental grasses. They have lon...
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Fountain Grass
Pennisetum alopecuroides
From eastern Asia. To 5 ft. high and wide. Clump of bright green foliage is topped by pinkish plumes. ...
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Fountain Grass
Pennisetum orientale
From central and western Asia. To 2 ft. high, 2 1/2ft. wide, with pinkish plumes standing above a moun...
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Fountain Grass
Pennisetum setaceum
Often grown as an annual in colder climates. From tropical Africa, southwestern Asia, Arabian Peninsul...
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Four O'Clock
Mirabilis
Strong-looking, mounding plants with the substance and character of shrubs—albeit only seasonal ...
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Four O'Clock
Mirabilis jalapa
Native to Peru. Grows 3 to 4 ft. tall and wide, with green leaves 2 to 6 in. long. Flowers in white an...
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Foxglove
Digitalis
Mainly from Europe, Mediterranean region. Erect plants 2–8 ft. high form low clumps of hairy gra...
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Foxtail Lily
Eremerus
Imposing lily relatives from western and central Asia, grown for 3–9-ft. tall spires of blooms. ...
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Foxtail Lily
Eremurus himalaicus
To 4–8 ft. tall, with white flowers. Leaves to 1 1/2 ft. long.
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