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Horehound Herb

Common · Lamiaceae

Old-fashioned bitter herb grown for teas, candies, and cough-drop flavoring. Tough and drought-tolerant once established, but slow from seed and happiest in poor, sunny, well-drained ground. Key facts: 75 days to maturity, 8+ hours of sun, 10–12 " spacing. Container-friendly (minimum 2-gallon pot).

Updated April 19, 2026 · Backed by 4 cited sources
Overview

At a Glance

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

Days to maturity
75 days
Sun
8+ hours
Full Sun
Spacing
10–12 "
between plants
Seed start
0–4 weeks
before transplant
Container
Yes
2+ gallon pot
Height
1.5–2 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
Time14–21 days
Optimal temperature68°F
Seed depth0.25"
Moving outdoors
Transplanting
Minimum soil temp50°F
Harden off5 days
Moisture
Watering
Weekly0.25–0.75 "
NeedsLow
Hand watering or drip
Root zone
Soil
pH range6–7.5
PreferredPoor To Average Sandy, Dry, Well Drained Soil
Horehound 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.

Horehound seeds

The leaves of the Horehound plant are widely used to flavor juices and teas.

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

Slow Germination

Cause: Seed is naturally slow and uneven to emerge.

Prevention: Sow shallowly and keep surface moisture even until seedlings appear.

Weedy Spread

Cause: Mature plants self-propagate if allowed to seed freely.

Prevention: Harvest at bloom and cut back before seed matures.

Root Rot

Cause: Wet heavy soil around the crown.

Prevention: Choose dry sandy ground and avoid overwatering.

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
Timing
Harvest

Harvest leaves and tops when plants just start to bloom.

Expected yield0.2–0.5 lbs/plant
Storage5 days — Use fresh promptly or dry stems thoroughly and store sealed.
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 Horehound'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 SeedsNowuniversity USU Extensionuniversity NC State Extensioninference Yield and zone notes inferred from common horehound perennial culture
Internal links

Horehound Herb Planting Dates by Zone

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