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Rue

Common · Rutaceae

Blue-green shrubby perennial herb with strongly aromatic bitter foliage. Historically grown as a medicinal and protective garden herb, rue is valued more for ornamental and traditional use than for modern culinary harvest. Key facts: 95–125 days to maturity, 6+ hours of sun, 18–24 " spacing. Not recommended for containers.

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
95–125 days
Sun
6+ hours
Full Sun
Spacing
18–24 "
between plants
Seed start
6–8 weeks
before transplant
Container
Not recommended
Needs 5+ gal if attempted
Height
2–3 ft
at maturity
Planting window

Zone Planting Guide

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Care

Growing Guide

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

Seed starting
Germination
Time10–21 days
Optimal temperature68°F
Seed depth0.25"
Moving outdoors
Transplanting
Minimum soil temp50°F
Harden off7 days
Moisture
Watering
Weekly0.4–0.8 "
NeedsLow
Drip or base watering
Root zone
Soil
pH range6–7.8
PreferredWell Drained Average To Lean Soil
Rue seeds

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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.

Rue seeds

Heirloom variety from Seeds Now.

Shop on Seeds Now
Resilience

Plant Health

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

Tolerance
Heat: High Cold: Moderate Drought: High

Common Issues

Root Rot

Cause: Poor drainage or excess irrigation

Prevention: Use raised or sharply drained beds and water sparingly

Frost Tip Burn

Cause: Late spring freeze on tender new growth

Prevention: Delay hard pruning until danger of hard frost passes

Skin Irritation

Cause: Sap can cause photodermatitis in sensitive gardeners

Prevention: Wear gloves and long sleeves when handling plants

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

Blue-green leaves are mature, aromatic, and fully expanded before the strongest summer bloom.

Expected yield0.25–1 lbs/plant
Storage5 days — Dry clipped stems in shade with good airflow.
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 Rue'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.

seed_catalog Seeds Nowuniversity North Carolina Extension Gardener Plant Toolboxreference Missouri Botanical Garden Plant Finderreference RHS herb referencesinference Estimated first-season establishment timing from perennial herb culture references
Internal links

Rue Planting Dates by Zone

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