Zenzei, (F1) Tomato Seeds

Zenzei (F1) Tomato Seed

2023 AAS-winning Roma excels under Midwestern conditions
Uniform plum tomatoes contain dense high-quality flesh
Strong resistance reduces spotting and blossom-end rot problems
Early abundant harvests simplify canning and sauce making

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Key Attributes

Botanical Name

Solanum lycopersicum

Days to maturity

72 Days

Sun

Full Sun

Packet

15 Seeds

About Zenzei, (F1) Tomato Seed, Tomato Seed

Zenzei Hybrid Roma Tomato Seeds produce a 2023 All-America Selections winner prized for its early maturity and exceptional productivity. Developed with Midwest growing conditions in mind, this dependable Roma-type tomato performs well even in less-than-ideal weather. The plants yield abundant, uniformly shaped plum tomatoes with dense, high-quality flesh and fewer problems such as spotting or blossom end rot, making Zenzei an excellent choice for sauces, canning, and other preserving needs.

Growing details

Planting

Sow Depth

1/16"

Days to Germination

5–10 days

In-row plant spacing

24-36"

Row Spacing

32-48"

Plant profile

Maturity

Summer, Fall

Life Cycle

Annual

Plant Height

84 inches

Growth Habits

Indeterminate

Type

ROMA TOMATOES

Seed & variety

Seeds Per Ounce

10,313

Color

Purple

Seed Type

Hybrid

Growing Season

Warm-Season Crop

Before Planting

Prepare for Tomato by selecting a full-sun, warm site with fertile, well-drained soil and good air circulation. Incorporate compost and adjust nutrients and pH according to a soil test, avoiding excessive nitrogen. Wait until frost danger has passed and the soil has warmed; harden transplants and install supports before planting when the crop requires them.

Planting

Start tomato seed indoors 6–8 weeks before the last expected spring frost, maintaining about 70–80°F until germination. After emergence, provide strong light and slightly cooler conditions to produce sturdy seedlings. Harden plants gradually and transplant after frost danger has passed and soil is at least 60°F. Set nongrafted transplants deeply; keep graft unions above the soil.

Watering

Provide 1–1½ inches of water weekly, keeping moisture consistent during flowering and fruit development. Water deeply at soil level to reduce fruit splitting, blossom-end rot, and foliage disease.

Fertilizer

Side-dress with a balanced vegetable fertilizer after plants establish and again when fruit begins forming. Avoid excessive nitrogen, which promotes foliage at the expense of flowers and fruit.

Harvesting

Harvest tomatoes when fruit reaches its expected size and full variety color and feels firm with a slight give. Twist gently or cut the stem to avoid damaging vines. Pick regularly to encourage continued production.

Tips

Install cages or stakes before plants become large, and mulch after the soil warms. Avoid aggressive pruning on determinate varieties. Protect blossoms from temperature extremes, which can reduce fruit set.

Disease Resistance Abbreviations

ToMV, TSWV, F, V, TYLCV, PM, N

Tomato Mosaic Virus, Tomato Spotted Wilt Virus, Fusarium Wilt, Verticillium Wilt, Tomato Yellow Leaf Curl Virus, Powdery Mildew, Root-Knot Nematodes

Pests & Diseases

Early and late blights, Septoria leaf spot, bacterial spot or canker, Fusarium and Verticillium wilts, and viruses affect tomatoes. Choose resistant varieties, rotate nightshades, mulch against soil splash, and stake plants. Remove incurably wilted or mosaic plants; discard fruit with expanding lesions rather than composting it.

Watch for hornworms, aphids, flea beetles, cutworms, and whiteflies. Inspect leaf undersides, handpick large caterpillars, use collars around young plants, and encourage beneficial insects before applying a labeled treatment.