Ferula communis ssp. glauca is a Mediterranean native that makes a big, bodacious statement in the garden, first with its silvery-black, lacy, see-through foliage then, in the second season, the foliage extends upward to 6' tall, topped by a 3' branched, firework-like inflorescence of yellow flower balls.
Giant Fennel Care
Ferula Glauca



What is the plant
Invasive in Italy.
How to Care for the Plant
Water
Water occasionally.
Fertilizer
You can fertilize the plant every spring using a general, all-purpose mixture.
Sunlight
Best grown in full sun to part shade.
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Soil
Best grown in fertile, organically rich, continuously moist to boggy soils. // Grows in fertile, organically rich, continuously moist to boggy soils. // Perform well in most types of soil.
Temperature
Ideal temperatures should be approximately 65-75ºF + (18-24ºC +), closer to 70ºF is best.
Container
Large plants can be top heavy and should be in a sturdy pot that isn’t easily tipped.
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Additional
Fennel essential oil is extremely toxic (neurotoxic) and for this reason its ingestion is not recommended.
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