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Sweet Woodruff

Sweet Scented Bedstraw · Rubiaceae

Fragrant shade-loving perennial herb and groundcover prized for vanilla-hay scented dried foliage. Best grown in moist, humus-rich soil with part to full shade, where it spreads gently by rhizomes. Key facts: 70–90 days to maturity, 2+ hours of sun, 10–14 " spacing. Container-friendly (minimum 2-gallon pot).

Updated April 19, 2026 · Backed by 5 cited sources
Overview

At a Glance

The essentials first: timing, light, spacing, seed-starting, container fit, and overall size.

Days to maturity
70–90 days
Sun
2+ hours
Part Shade To Full Shade
Spacing
10–14 "
between plants
Seed start
6–8 weeks
before transplant
Container
Yes
2+ gallon pot
Height
0.5–1 ft
at maturity
Planting window

Zone Planting Guide

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This card updates instantly with viability, frost timing, and any planting notes for your selected zone.

Care

Growing Guide

Everything in one place: seed starting, transplant timing, watering, soil, and structural support.

Seed starting
Germination
Time14–30 days
Optimal temperature60°F
Seed depth0.125"
Moving outdoors
Transplanting
Minimum soil temp45°F
Harden off5 days
Moisture
Watering
Weekly1–1.5 "
NeedsConsistent
Drip or hand water at soil level
Root zone
Soil
pH range5.5–7
PreferredHumus Rich, Moist, Well Drained Woodland Soil
Sweet Woodruff seeds

Recommended seeds · paid link ?When you shop through this link, SoilStack earns a small commission at no extra cost to you. It's how we keep the site free and the calendar ad-free. Every product on this page was hand-selected based on university extension research.

When you shop through this link, SoilStack earns a small commission at no extra cost to you. It's how we keep the site free and the calendar ad-free. Every product on this page was hand-selected based on university extension research.

Sweet Woodruff seeds

90-120 days. When crushed or cut, and especially dried, it has a grassy vanilla fragrance.

Shop on Seeds Now
Resilience

Plant Health

Stress tolerance, resistance notes, and the most common problems to watch for as plants mature.

Tolerance
Heat: Low Cold: High Drought: Low

Common Issues

Summer Dieback

Cause: Hot dry conditions in exposed sites.

Prevention: Grow in shade, mulch, and irrigate during drought.

Rhizoctonia Web Blight

Cause: Dense wet foliage in humid heat.

Prevention: Thin congested patches and avoid overhead watering

Over Spreading

Cause: Rhizomes expand happily in rich moist shade.

Prevention: Edge and divide patches as needed.

Feeding & picking

Nutrition & Harvest

How hungry the plant is, what ripe harvest looks like, and how long the crop keeps after picking.

Feeding
Nutrition
Feeding intensityLight feeder
RecipesWorm Castings Topdress, Compost Tea
Timing
Harvest

Healthy whorled foliage and fresh flowered stems with strong fragrance once dried.

Expected yield0.1–0.3 lbs/plant
Storage7 days — Use fresh briefly or dry bunches in a dark airy place for strongest scent.
Plant relationships

Companion Planting

Helpful neighbors can support growth or deter pests. Keep antagonistic plants separated to reduce stress and competition.

What you'll need

Growing Supplies

Based on Sweet Woodruff's growth profile -- recommendations matched to this variety's specific requirements.

Drip irrigation / soaker hose kit

Every gardener benefits from putting water at the root zone instead of on the leaves, because drip and soaker systems reduce foliar disease pressure by limiting leaf wetness and soil splash. A quality kit should include a backflow preventer, filter, pressure reducer, and UV-resistant tubing.

Source: Iowa State University Extension; Colorado State University Extension; UMass Extension

Soil test kit

A soil test gives a baseline for pH and nutrient status so gardeners can add only what the soil actually needs. Prioritize a mail-in or lab-affiliated kit whenever possible because extension guidance notes that laboratory testing is more accurate than instant readers.

Source: University of Maryland Extension; Purdue Extension; Montana State University Extension

Quality bypass pruners

Extension guidance favors bypass designs because they make cleaner, closer cuts on living tissue than anvil types. Look for hardened steel blades that can be sharpened, a comfortable grip, and a cutting capacity matched to real home-garden stems.

Source: University of New Hampshire Extension; Iowa State University Extension; Purdue University Extension

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Research

Sources

Reference material and extension guidance used to build this growing guide.

university Penn State Extensionuniversity Illinois Extensionuniversity South Dakota State University Extensionuniversity University of Maryland Extensioninference Estimated first-season establishment timing from extension groundcover guidance
Internal links

Sweet Woodruff Planting Dates by Zone

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