North America Non-native Plant

Hypericum Grandifolium

Botanical name: Hypericum grandifolium

USDA symbol: HYGR6

Native status: Not native but doesn't reproduce and persist in the wild

The Mystery of Hypericum grandifolium: When Plant Names Lead Nowhere Sometimes in the world of gardening, we encounter plant names that send us down rabbit holes of confusion. Hypericum grandifolium is one of those puzzling cases that highlights why getting your plant identification right matters before you start planning your ...

The Mystery of Hypericum grandifolium: When Plant Names Lead Nowhere

Sometimes in the world of gardening, we encounter plant names that send us down rabbit holes of confusion. Hypericum grandifolium is one of those puzzling cases that highlights why getting your plant identification right matters before you start planning your garden space.

What We Know (And Don’t Know) About This Plant

Here’s the thing about Hypericum grandifolium – it’s a bit of a botanical mystery. While Hypericum is a legitimate and well-known genus in the St. John’s Wort family, the species name grandifolium doesn’t appear in standard botanical references for this genus. This could mean several things:

  • The name might be a misidentification of another Hypericum species
  • It could be an outdated or invalid botanical name
  • It might be a very localized or rare variant that hasn’t been widely studied

Without reliable botanical documentation, we can’t provide accurate information about its native status, geographical distribution, growing requirements, or garden suitability.

Why This Matters for Your Garden

When you’re trying to choose plants for your landscape, especially if you’re interested in native gardening, having the correct plant identification is crucial. Planting the wrong species can lead to:

  • Plants that don’t thrive in your conditions
  • Accidentally introducing non-native or potentially problematic species
  • Missing out on the wildlife benefits you were hoping for
  • Wasted time, money, and garden space

Better Alternatives: Proven Hypericum Species

Instead of searching for the elusive Hypericum grandifolium, consider these well-documented and reliable Hypericum species that might meet your gardening needs:

  • Hypericum perforatum (Common St. John’s Wort) – though check invasive status in your area
  • Hypericum calycinum (Rose of Sharon) – good groundcover option
  • Hypericum prolificum (Shrubby St. John’s Wort) – native to eastern North America
  • Hypericum frondosum (Golden St. John’s Wort) – attractive shrub form

What to Do Next

If you came across Hypericum grandifolium in plant lists or garden references, here’s what we recommend:

  • Double-check the source and see if there’s additional clarification
  • Consult with local botanists, extension services, or native plant societies
  • Consider whether it might be a misprint of another Hypericum species
  • Focus on well-documented native alternatives instead

Remember, successful gardening starts with reliable plant information. When in doubt, stick with species that have clear documentation, known growing requirements, and established track records in gardens. Your plants (and your sanity) will thank you for it!

Hypericum Grandifolium

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Dilleniidae

Order

Theales

Family

Clusiaceae Lindl. - Mangosteen family

Genus

Hypericum L. - St. Johnswort

Species

Hypericum grandifolium Choisy

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA