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Heracleum maximum

Is Heracleum maximum growing in your garden? Record it and all of your plants in Known.

Names

Common Names
Cow Parsnip, American Hogweed, Masterwort

Growth

Height
4-10 feet
Growth Rate
Moderate

Appearance

Bloom Color
Purple, Yellow, White
Foliage Color
Green to yellow-green

Environment

Sunlight Requirements
Ideally full sun to full shade.
Soil Type
Deep, well-drained loamy or sandy loam soils (often derived from limestone and shale); tolerates clay or gravelly substrates.
Soil Drainage
Well-drained soil is ideal, Loamy soil is best, Sandy loam also provides good drainage
Soil pH
5.4-6.7 Moderately acidic to neutral

Lifecycle

Lifecycle
Biennial (short-lived perennial)
Leaf Lifecycle
Deciduous
Seasons of Interest
Spring, Summer and Winter
Bloom Time
Spring to Summer (late spring to mid-summer; June–July)

Reproduction

Propagation Methods
Seeds

Wildlife

Attracts Wildlife
Sources indicate bees and butterflies are attracted to cow parsnip, hummingbirds and birds are not indicated, and flowers attract many different pollinators.

References

References

Taxonomic data from World Flora Online, accessed June 20, 2024