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Organic Non-GMO Greens - Specialty::Organic Non-GMO Radicchio::Organic Palla Rossa Radicchio

Organic Palla Rossa Radicchio  Organic Non-GMO Palla Rossa - An Italian favorite! Palla Rossa is a variable strain of a Chioggia-type radicchio with dense round heads which grow to 3-4" at maturity. For an open-pollinated variety, this radicchio produces a high percentage of well-wrapped, dense heads, but has proven to have variations in coloring and maturity. Works well for leaf cuttings all season and best for fall harvest of heads when color and flavor is best. (Chicorium intybus)

Days to maturity: 90 days
SKU Description Our price
1990A 1/32 OZ $3.40
1990B 1/8 OZ $7.00
1990C 1/2 OZ $20.00
1990D 2 OZ $54.00
1990E 1/2 LB $180.00
1990L001 1 LB $340.00

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Organic Radicchio: Growing and Seed Saving Info

Downloadable version of Radicchio Growing and Seed Saving Info

Radicchio is a cool season annual in the Asteraceae/Compositae family, which includes lettuce, endive, escarole, chicory, globe artichoke, sunflower, Jerusalem artichoke, salsify, and burdock. Radicchio has similar culture to lettuce, but produces very tight heads with blanched interiors and unique bitter flavor. Radicchio is a popular component of mesclun mix because of its unusual color and sophisticated flavor. There are several types:

  • Sugarloaf radicchios are narrow and upright with green outer leaves and crispy yellow-white interiors
  • Treviso-type radicchios have upright, elongated heads with burgundy interior leaves that have bright white ribs
  • Chioggia-type radicchios have round and slightly flattened, densely packed heads with bright magenta interiors

Soil Requirements

Radicchio does well in the same conditions as lettuce, preferring cool, well-drained, loose soil. As with lettuce, use 50-75lbs Nitrogen/acre, ~150lbs Phosphorus and Potassium/acre. Side-dress with N 3-4 weeks after planting. When transplanting, use 2lbs/50 gallons starter fertilizer, 4-8oz per plant.

Position

Full sun to part shade.

Seeding Depth

1/8

Seeding Rate

Direct seed 3 seeds every 8.

Plant Spacing

8-12

Row Spacing

18

When to Sow

Radicchio does best in the cool weather of spring, fall, and early winter, and fall crops tend to have fewer problems and produce larger heads. Direct seeding is not recommended in early spring because of the risk of cold-induced bolting. Sow in a greenhouse in plug trays (2 seeds/plug, thinned to one) with tapered cells and a fine-textured starting mix. Cover seeds lightly with vermiculite. Ideal germination temp is 75F (day) and 68F (night). Feed with liquid fertilizer once seedlings have germinated. Seedlings should be ready to plant out in 3-4 weeks.

Other Considerations

The use of row cover is not recommended for radicchio except when threatened by heavy frost.

Frost Tolerant

Radicchio can withstand light frosts, just peel off damaged outer leaves. Leafier varieties are more frost-tolerant. Color and flavor benefit from extreme fluctuations between day and nighttime temperatures.

Drought Tolerant

Chicories are generally drought-tolerant but require even moisture for uninterrupted growth. Irrigation is recommended during dry periods.

Heat Tolerant

Radicchio may bolt in hot, dry weather. Provide adequate moisture. Choose varieties like Leonardo F1 and Virtus F1 for summer plantings.

Seed Specs

About 20,000 seeds/oz.

Seeding Rate

At a rate of 3 seeds every 8: 220/1M; 1,100/5M; 2,200/10M;

and 131M/acre.

Harvest

Begin harvesting 6-10 weeks after planting out seedlings. Heads are firm when mature and will not continue to grow after this point (except to bolt). Heads hold better in the field in cool fall weather. Ideal size is about 5 in diameter for Chiogggias, 7-8 tall for Trevisos and 10 tall for Sugarloaf. Leaves pulling away or heads becoming pointy are early signs of bolting. Use a sharp harvest knife to cut plant at the base of the head, being careful not to cut the head itself. Heads should be harvested in cool weather or chilled immediately. Heads are usually trimmed for sale.

Storage

Heads will keep for 3-4 weeks if refrigerated in a perforated plastic bag or tote.

Disease Resistance

In moist, damp conditions bottom rot may occur, but radicchio is much less susceptible than lettuce.

Seed Saving

Radicchio will easily go to seed if allowed. The flowers are insect-pollinated and can cross pollinate with other radicchios, endives, or Wild Chicory, which is very commonly found. For pure seed, isolate by mile or cage plants. It can be difficult to separate seeds from flowers; crush the dried flowers to release the seeds. Seeds will be viable for 4-8 years starting with approximately 70% germination.




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