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Foxglove Flowers

Standard · Plantaginaceae

Foxglove is a dramatic biennial with tall spikes of tubular pink, purple, and white bells, often speckled in the throat. Seeds Now describes plants 3-5 feet tall, and common foxglove typically forms a leafy rosette in year one before sending up flowering stems in year two. It is best used for vertical cottage-garden structure, pollinator support, and cut spikes in cooler or part-shaded settings. Key facts: 365–430 days to maturity, 4+ hours of sun, 15–18 " spacing. Can be grown in containers with care (5+ gallon minimum).

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
365–430 days
Sun
4+ hours
Morning Sun To Part Sun; Full Sun In Cool Climates
Spacing
15–18 "
between plants
Seed start
6–8 weeks
before transplant
Container
Possible
Needs 5+ gal minimum
Height
3–5 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.

Resilience

Plant Health

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

Tolerance
Heat: Low Cold: Moderate Drought: Low

Common Issues

Crown Rot

Cause: Wet poorly drained soil can rot crowns and roots.

Prevention: Use well-drained soil and keep mulch off the crown.

Leaf Spot

Cause: Dense planting and prolonged leaf wetness encourage foliar spotting.

Prevention: Space generously and water at the base.

Slug Damage

Cause: Tender young rosettes attract slugs and snails in cool wet weather.

Prevention: Use traps or hand-pick during establishment.

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
RecipesRoot Drench, Worm Castings Topdress
Timing
Harvest

Cut spikes when the lowest flowers are open and upper buds are still coloring for the best vase life.

Expected yield0–1 lbs/plant
Storage5 days — Keep cut stems cool in clean water; seed capsules can be dried on the plant for saving.
Plant relationships

Companion Planting

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

Avoid planting near
Herb Fennel
What you'll need

Growing Supplies

Based on Foxglove'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 Wisconsin Horticultureuniversity Colorado State University Extensionuniversity N.C. State Extension
Internal links

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