Page 41 - JAMS Organic Farms Imported Seeds

11. 507.54 Joi Choi (F1) Green Seed, 1 X 5000 seeds
Days to maturity: 50 days. (Annual)
Heavy, vigorous white-stem pac choi. Joi Choi forms a 12-15" tall, broad, heavy plant with dark green leaves and thick, flattened white petioles. Tolerant to heat and cold. Space 10-12" apart. Avg. 10,200 seeds/oz. Packet: 250 seeds.
To prevent breakage at harvest, allow to wilt slightly in field after cutting, pack in boxes, then hydrocool or liquid-ice to restore
GROWING INFORMATION
SCIENTIFIC NAME: Brassica rapa var. chinensis
CULTURE: Sow from early spring through midsummer. In the South, pac choi is well adapted for fall plantings. Suitable for fall sowing in mild climates or in a high tunnel or other protected structure in colder climates. Premature bolting of seedlings may occur if temperatures drop below 50°F (10°C), especially over multiple nights. Cold temperatures generally do not cause bolting of plants past the seedling stage.
DAYS TO MATURITY: From emergence after direct seeding.
DIRECT SEEDING: Sow 15 seeds/ft., 1/4" deep in rows 12-18" apart. Thin plants as recommended in our Pac Choi Comparison Chart. For baby-leaf production of 'Rosie', the only pac choi we recommend for baby leaf, see the Baby-Leaf Brassica Greens culture.
INSECT PESTS: Flea beetles can be controlled by covering with floating row covers from day of sowing.
HARVEST: Harvest before flowering.
AVG. SEEDING RATE: For bunching: 830'/oz., 13,000'/lb. at above spacing. SEED SPECS: SEEDS/OZ.: Avg. 10,300.
PACKET: 250 seeds. Full size: sows 16'; Baby leaf: sows 4' NB: Can be grown hydroponically, heat tolerant