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Wormwood

Common · Asteraceae

Silvery perennial medicinal herb valued for its intensely bitter aromatic foliage. Traditionally used in herbal preparations and planted as a strongly scented border herb, but not used as a casual culinary seasoning. Key facts: 100–130 days to maturity, 6+ hours of sun, 24–36 " 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
100–130 days
Sun
6+ hours
Full Sun
Spacing
24–36 "
between plants
Seed start
6–8 weeks
before transplant
Container
Not recommended
Needs 7+ gal if attempted
Height
2–4 ft
at maturity
Planting window

Zone Planting Guide

Switch zones to see whether this plant is a strong fit, what frost timing looks like, and any extra notes worth planning around.

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

Resilience

Plant Health

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

Tolerance
Heat: High Cold: High Drought: High

Common Issues

Root Rot

Cause: Poor drainage or frequent irrigation in heavy soil

Prevention: Use sharply drained soil and water sparingly

Woody Floppy Growth

Cause: Excess shade or overly rich soil

Prevention: Keep in full sun and avoid heavy feeding

Self Seeding

Cause: Flowers left to mature

Prevention: Clip flower stems before seed ripens if spread is unwanted

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

Silvery foliage is fully expanded and strongly aromatic before flowering.

Expected yield0.5–1.5 lbs/plant
Storage5 days — Use fresh sparingly or dry foliage in a dark airy space.
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 Wormwood'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 Toolboxuniversity Penn State Extensionreference Missouri Botanical Garden Plant Finderinference Estimated first-season establishment timing from perennial herb culture references
Internal links

Wormwood Planting Dates by Zone

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