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



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.

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.

Additional

Fennel essential oil is extremely toxic (neurotoxic) and for this reason its ingestion is not recommended.
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