Last edited on 16 Oct 2026. View history

radicchio Radicchio

Cichorium intybus
Also known as Italian chicory (en)

How to sow radicchio: Direct seed indoors, transplant seedlings outside after hardening off

Sun requirement for radicchio: Plant in Full Sun

Radicchio is a leaf vegetable that grows in compact, dense heads. It's leaves have a bitter, spicy taste that complement fresh salads in small doses. When sautéed, grilled, or roasted, it's flavor deepens and it becomes less bitter. It is a cool weather crop.

2
plantings
0
harvests
2
seed packets
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Growing radicchio

Annual

living and reproducing in a single year or less

Height

15cm

Spread

10cm

Row Spacing

20cm

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How to save seeds

by shiny,

Beans, peas and corn: remove husks and allow seeds to dry out – this may take a couple of weeks, then remove casings and store.

Pumpkins and melons: seeds need to be washed and set aside to dry for a week or so before …

beans peas corn corn pumpkin pumpkins melon melons lettuce lettuces celery celery parsnip parsnips carrot carrots leek leeks onions radicchio radicchio cucumbers tomatoes zucchini zucchini capsicum capsica
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Transplant day!

by inkstone,

I originally wanted to do this yesterday but it rained in the morning so that kinda put a damper on things.

So I did it all today instead! A bunch of the seeds I wintersowed in the milk jugs and soda bottles were getting crowded so it was time to move them to their bigger (permanent) containers….

spinach spinach mizuna arugula arugula tatsoi lettuce lettuces radicchio radicchio broccoli broccoli Malabar spinach Malabar spinach okra okra parsley anise
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Ecological requirements

Data from the FAO EcoCrop database for Cichorium intybus L.

Family / Taxonomy Magnoliopsida
Asteridae
Asterales
Compositae
Optimal temperature 10 - 30 °C
Absolute temperature 6 - 35 °C
Killing temperature growth: -1 °C, rest: -5 °C
Optimal rainfall 1500 - 2500 mm/year
Absolute rainfall 300 - 4000 mm/year
Optimal soil pH 6.0 - 7.5
Absolute soil pH 4.5 - 8.3
Crop cycle 90 - 330 days
Max altitude 2000 m
Life form herb
Life span biennial, perennial
Habit erect
Optimal soil depth medium (50-150 cm)
Optimal soil texture medium
Optimal soil fertility moderate
Optimal soil drainage well (dry spells)
Optimal soil salinity low (<4 dS/m)
Photoperiod short day (<12 hours), neutral day (12-14 hours), long day (>14 hours)
Optimal light very bright to clear skies

Licensed under CC-BY-4.0 .

Food and Agriculture Organization of the United Nations (2025) ECOCROP, the crop ecological requirements database. Version 1. https://data.apps.fao.org/catalog/dataset/ecocrop. Accessed through the CGIAR Climate Action Data Hub, https://cgiar-climate-data-hub.github.io/catalog/ecocrop_1/.

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