Radicchio

Cichorium intybus var. foliosum

vegetable

verifiedReviewed by the GreenScout Team

Radicchio is a red or variegated Italian chicory forming compact, firm heads with a pleasantly bitter flavor. It requires cool weather to develop deep color and is often forced under darkness to enhance the burgundy hue. Radicchio matures in 60–100 days and stores well.

Common Problems

Select the problem your Radicchio is experiencing to get a treatment guide.

hourglass_bottom

Slow Growthchevron_right

bolt

Boltingchevron_right

warning

Yellow Leaveschevron_right

scatter_plot

Brown Spotschevron_right

Care Guide

light_mode

Light

Full sun (6–8 hours daily) for head formation and color development; some shade in intense heat.

water_drop

Water

Keep soil consistently moist but not waterlogged. Water 2–3 times weekly; reduce frequency as heads mature.

compost

Soil

Well-draining, fertile loam with pH 6.0–7.5. Add compost before planting for best head development.

science

Fertiliser

Apply balanced fertilizer (10–10–10) every 3–4 weeks. Side-dress with nitrogen in early growth.

thermometer

Temperature

Cool-season crop; optimal 55–70°F (13–21°C). Cold exposure (near freezing) enhances red coloration.

humidity_percentage

Humidity

Moderate humidity (45–60%) is optimal. High humidity may increase fungal disease risk.

Toxicity

check_circleSafe for Catscheck_circleSafe for Dogscheck_circleSafe for Children

Radicchio is entirely edible and non-toxic. All parts are used in salads and cooked dishes.

Common Diseases

grainLeaf Spotchevron_right spaPowdery Mildewchevron_right spaBotrytis Blightchevron_right

Common Pests

blur_onAphidschevron_right bug_reportSlugs And Snailschevron_right hiveCaterpillarschevron_right

Seasonal Care

local_floristspring

Resume regular watering and feeding as growth picks up.

light_modesummer

Peak growing season. Water and feed regularly.

ecoautumn

Reduce watering as growth slows. Stop heavy feeding.

ac_unitwinter

Minimal watering and feeding. Protect from frost if needed.

Frequently Asked Questions

Why is my Radicchio not turning deep red?

Cold exposure near freezing enhances red coloration — Radicchio needs cool weather to develop its deep burgundy hue, and growers sometimes force it under darkness to intensify the color further.

How long does Radicchio take to form a head?

It matures in 60–100 days and stores well afterward — as a chicory, it needs the full cool-season window to form its compact, firm heads with their pleasantly bitter flavor.