Hypericum Calycinum

Saint John's Wort, Aaron's Beard

Note: This is an archive page preserved for informational use.
Cultural and Growing Info is provided below.


Compact yellow flowers. Spreading groundcover

A popular groundcover, with large golden-yellow flowers with bushy stamens tipped with red, blooms all summer. Hypericum Calycium have upright stems of bright green leaves, forming a dense weed-proof patch.

Allan Armitage calls this "one of the finest ground covers available." Will compete well with shallow tree roots and perfect for stabilizing embankments. Great for dry shade, but flowering may be reduced.

Code HYCA

Patent

Plant Type Perennials, Groundcovers

Species

Height Short 12"

Spacing Plant 14" apart

Bloom Time Early Summer to Late Summer

Sun / Shade Full Sun to Half Sun / Half Shade

Zones 5-9

Soil Type Normal

Water Needs Low

Sold In Plantable Pots (3.5x3.5x4")

Special Product

Bluestone Classics

You can't go wrong with the classics! These tried and true varieties are our staff's top picks for gardeners looking for low maintenance plants that will dazzle in the border.

Special Features

  • Beneficial for Pollinators
  • Deer Resistant

Planting Sites

  • For a Slope or Bank
  • Hot Dry Site Tolerant
  • Dry Shade Tolerant
  • Groundcovers
  • Seaside/Salt Tolerant

Hypericum General Information

Hypericums spread fairly fast by underground stems. Good for bank stabilization. Excels even in poor soil forming a thick lush carpet. Evergreen in warmer climates. Idaho has restricted all potted plant material from being shipped into Idaho at this time.

Hypericum Plant Care

Mow or shear plants in late winter or early spring to help new growth. Benefits from partial shade and moister conditions in southern gardens. Will benefit from division every 2-3 years in spring or fall.

Plantable Pots

Our plants are grown in 3.5x3.5x4” plantable pots. Made from 100% biodegradable coconut husk fibers (coir), these pots have tremendous advantages over plastic pots. With better air exchange, this "breathable" pot fosters robust root growth and reduces transplant shock since you can plant the pots directly in the ground. The pot naturally becomes part of the soil on its own over time—no composting required—and since they're made from a renewable resource that requires very little energy, they're earth-friendly too!

100% Guarantee

We offer a 100% unconditional guarantee for all our perennials to reach you in good condition and to grow. If you're not satisfied, we'll reship or refund immediately. Please don't hesitate to contact us if you have questions or concerns—we share your passion for gardening and want your new plants to thrive in your border!

Shipping Details

We use custom, earth-friendly packaging to make sure your order arrives in great condition, and we ship based on the best planting time for your growing zone (see the approximate dates below), unless otherwise indicated at checkout. If you wish, you can indicate a specific ship date during checkout.

Spring

  • Zone 3, 4: Early to Mid May
  • Zone 5: Late April to Early May
  • Zone 6: Mid to Late April
  • Zone 7: Early to Mid April
  • Zone 8: Late March to Early April
  • Zone 9, 10: Late March

Fall

  • Zone 2, 3, 4: Early September
  • Zone 5: Early to Mid September
  • Zone 6: Mid September
  • Zone 7: Mid to Late September
  • Zone 8, 9, 10: Late September to Early October