Flower Garden · Seed to Bloom

How to grow hollyhock

Grow hollyhocks for towering cottage-garden spires in yellow, rose, white, purple, maroon, and near-black.

Sow shallowlyPlan for tall spikesProtect foliage from rust
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Botanical illustration of multicolor hollyhock spires
Botanical nameAlcea roseaHollyhock
Sow depth¼ inchCover lightly
Germination10–14 days65–70°F
Spacing18–24 inchesAllow airflow
BloomYear one or twoSeries dependent

Flower profile

Build a tall flowering wall from a sturdy rosette.

Hollyhocks form broad basal leaves before sending up tall bloom spikes. Some strains flower the first year; traditional types often bloom after overwintering.

Airflow is the best rust preventionSpace plants openly, water at soil level, and remove affected lower leaves promptly. Avoid crowding hollyhocks against an airless wall.

hollyhock at a glance

From planting to a productive garden display

01Sow8–10 weeks early02Sprout10–14 days03Pot onTrue leaves04PlantAfter frost05RosetteCrown builds06BloomYear one or two

Planting

Sow shallowly and protect the taproot.

Start in deep cells or direct sow so roots are disturbed as little as possible. Transplant into sun with generous spacing.

01

Cover about ¼ inch

Keep the mix evenly moist.

02

Pot on before roots bind

Handle the developing taproot gently.

03

Space 18–24 inches apart

Choose full sun and a site protected from wind.

Ongoing care

Keep plants healthy and productive

Give full sun

Strong light supports sturdy spikes.

Water at soil level

Keep leaves dry whenever possible.

Stake before bloom

Secure stems loosely before flowers become heavy.

Remove diseased foliage

Clean up rusted leaves and fall debris.

Season checkpoints

Follow the plant’s visible progress.

10–14 days

Seedlings emerge

8–10 weeks

Plants are transplant-ready

Rosette established

Crown strengthens

Spike rising

Support is installed

Cutting and display

Cut when lower flowers begin opening.

For tall arrangements, cut when the first lower flowers open and upper buds show color. Condition in deep clean water.

  1. Cut in the cool morning.
  2. Strip submerged foliage.
  3. Leave enough basal growth for recovery.

Urban Farmer selections

Choose a hollyhock color

Blacknight product imageNear-black · tall spikeBlacknightDeep dark flowers for dramatic cottage borders.Checking availability…Shop Blacknight →Radiant Rose product imageRose · tall spikeRadiant RoseClear rose flowers on upright garden spires.Checking availability…Shop Radiant Rose →Polarstar product imageWhite · contrasting eyePolarstarBright white flowers for luminous vertical accents.Checking availability…Shop Polarstar →

Questions flower gardeners ask

Hollyhock growing FAQ

When should hollyhock seed be started?

Start 8–10 weeks before frost or direct sow.

How deep should seed be planted?

Cover about ¼ inch.

How long does germination take?

Usually 10–14 days.

When will hollyhocks bloom?

Year one or two depending on series.

How far apart should plants be?

Space 18–24 inches.

Do they need full sun?

Yes, for sturdy spikes.

Should hollyhocks be staked?

Tall spikes often need support.

How can rust be reduced?

Use airflow, soil-level watering, and sanitation.

Will hollyhocks self-sow?

They often reseed if stalks mature.

Can they grow in containers?

Only in deep large containers that support the taproot.

Ready to plant?

Create a towering cottage-garden backdrop.

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