Blue Woodruff

Herbaceous

Blue Woodruff

Asperula orientalis

Also known as: Annual Blue Woodruff, Oriental Woodruff

HerbaceousGround Cover Rubiaceae PollinatorWildlife AttractorBorder Plant
Hardiness Zone
2-10
Ideal Temp
45–78°F
Survives Down To
25°F
Life Cycle
Perennial

Asperula orientalis is a frothy annual with whorls of narrow leaves and dreamy sky-blue flowers — the woodruff label is about look and habit, not a promise it tastes like Galium odoratum. Grow it where you want spring sparkle under taller perennials, then let it reseed or collect seed before the heat turns it crispy. subtropical and tropical Americas: treat as cool-season-to-early-summer annual; afternoon shade helps when the thermostat mocks your ambitions. ☀️💧 Sun and Water: - Full sun in cool weather; part shade as days lengthen and bake. - Even moisture; avoid bone-dry pots. - Average garden soil; not a bog plant. ✂️ Propagation: - Direct-sow after last frost or start indoors 4–6 weeks early. - Self-sows lightly where happy.

Good Neighbors
  • Dill
  • Calendula
  • Borage
Cautions
  • Deep shade and standing water
Known Threats — Organic Solutions Only
Aphids
Aphidoidea
Slugs
Gastropoda