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Broadleaf Sage Herb

Broadleaf · Lamiaceae

Classic gray-green culinary sage with broad aromatic leaves used fresh or dried. A low-input perennial herb that needs sun, sharp drainage, and periodic renewal as stems become woody. Key facts: 75 days to maturity, 8+ hours of sun, 24–30 " spacing. Container-friendly (minimum 3-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
24–30 "
between plants
Seed start
6–8 weeks
before transplant
Container
Yes
3+ gallon pot
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 temp55°F
Harden off7 days
Moisture
Watering
Weekly0.5–1 "
NeedsLow
Drip or hand watering at the soil line
Root zone
Soil
pH range6–7.5
PreferredVery Well Drained Sandy Or Gravelly Loam
Sage - Broadleaf seeds

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Sage - Broadleaf seeds

Sage is an aromatic perennial plant that is actually part of the mint family.

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Resilience

Plant Health

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

Tolerance
Heat: Moderate Cold: Moderate Drought: Moderate

Common Issues

Winter Crown Rot

Cause: Poor drainage and wet crowns through cool weather.

Prevention: Plant in raised or sharply drained soil and avoid heavy mulch over the crown.

Woody Decline

Cause: Older plants become stemmy and produce less tender foliage.

Prevention: Replace or divide every 3-4 years and prune in spring.

Sprawling

Cause: Shade or rich soil causes loose growth.

Prevention: Grow in full sun and keep fertility low.

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 mature leaves or 6-8 inch shoots before or at first bloom.

Expected yield0.25–0.75 lbs/plant
Storage7 days — Refrigerate fresh sprigs briefly or dry cut 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 Broadleaf Sage'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 University of Maryland Extensionuniversity Illinois Extensioninference Seed germination values inferred from culinary sage seed culture
Internal links

Broadleaf Sage Herb Planting Dates by Zone

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