How to grow radicchio in your garden
What's the story
Radicchio, known for its beautiful red leaves and crisp texture, is a prized addition to any cool season garden.
Native to Italy, this leafy veggie loves the cold, making it perfect for planting in the fall or early spring.
This article gives you the lowdown on how to grow radicchio like a pro. Get ready for a harvest full of flavor and health benefits!
Variety
Selecting the right variety
There are many types of radicchio, but for home gardens, experts recommend the Rosso di Treviso and Variegato di Castelfranco.
These varieties are cold-hardy and have a less intense bitterness compared to other types.
When choosing seeds or seedlings, make sure to buy from reputable suppliers to ensure quality and disease resistance.
Soil prep
Preparing the soil
Radicchio thrives in well-draining soil rich in organic matter with a slightly acidic pH between six and 6.8.
Before planting, amend the soil with compost or well-rotted manure to improve fertility and structure.
A two-inch layer incorporated into the top six inches of soil should be adequate.
Investing time in proper soil preparation is key to fostering healthy root development and ensuring successful growth.
Planting
Planting guidelines
In most areas, radicchio should be planted in late summer for a fall or early winter harvest before heavy frosts occur.
Either sow seeds directly into prepared beds at a depth of approximately one-quarter inch or transplant seedlings.
Space them 10 inches apart in rows 18 inches apart.
Water regularly to maintain consistent moisture as radicchio needs evenly moist soil but not waterlogged.
Temperature control
Managing temperature and light
Radicchio thrives in cool weather, ideally with daytime temperatures ranging from 60 degrees Fahrenheit to 65 degrees Fahrenheit, and a bit cooler at night.
If temperatures regularly rise above 75 degrees Fahrenheit, the plant may bolt (i.e., prematurely produce flowers), or its leaves may acquire an unpleasant bitterness.
To protect your radicchio from intense heat or direct sunlight, use a shade cloth to shield them, especially on very sunny days.
Harvest time
Harvesting your radicchio
Radicchio heads can be harvested when they are firm and well-formed, typically three months after planting, depending on the variety and growing conditions.
Simply harvest by cutting the head at the base, leaving about an inch of stem.
This may encourage new shoots to sprout, potentially offering a second harvest if conditions remain favorable.