How to Grow Poinsett Cucumbers From Seed

By Maxim Kaufman — Founder & CEO, Organo Republic

Updated July 2026

Poinsett is a dependable, disease-resistant slicing cucumber prized for its long, straight, dark-green fruit. The vigorous vines shrug off common leaf diseases and keep producing smooth 7 to 8 inch cucumbers over a long season, maturing in about 65 days. It is an easy, reliable choice for fresh eating, sandwiches, and salads. Grow it on a trellis for clean, straight fruit and steady harvests all summer.

This is the quick guide to Poinsett. For the full step-by-step on starting seeds, sowing, feeding, and troubleshooting cucumbers, see our complete guide to growing cucumbers from seed.

Quick start

Direct-sow seeds half an inch to one inch deep once the soil has warmed to at least 65 to 70F, in full sun. Train the vines up a trellis and thin plants to about 12 inches apart for the straightest fruit. Water evenly, one to two inches a week, so the cucumbers stay crisp and mild. Start slicing cucumbers at 7 to 8 inches from about 65 days, cutting them while still firm and dark green, and pick every day or two to keep the vines going.

Best tip

Grow Poinsett up a trellis and let its disease resistance do the work. Keeping the vines off the ground gives long, straight fruit and better airflow, which is a real advantage in hot, humid regions like the Southeast where powdery and downy mildew hit hardest; Poinsett was bred to resist several of those diseases. In short-summer areas like the northern Midwest, start seeds indoors 3 weeks early so this 65-day slicer has time to finish.

At a glance

Botanical nameCucumis sativus

Plant typeWarm-season annual vine

USDA zones3 to 11 (grown as a summer annual)

SunFull sun (6 to 8 hours)

Days to maturityAbout 65 days

Height6 to 8 ft on a trellis

SpacingThin to 12 inches apart

Water1 to 2 inches per week, steady

Uses

Poinsett is a classic all-purpose slicer. Its long, smooth, dark-green fruit is best fresh: sliced into green salads, layered on sandwiches, or tossed with vinegar, dill, and onion for a quick cucumber salad. The crisp flesh also blends into chilled soups and infused water, and smaller fruit make good refrigerator pickles. Because the vines yield steadily, one planting keeps the kitchen in fresh cucumbers through the summer.

Frequently asked questions

How long does Poinsett cucumber take to grow?

Poinsett is ready to slice in about 65 days from sowing. Once the first fruit sizes up, the vigorous vines keep producing over a long season, so you can harvest fresh cucumbers for weeks if you keep picking and watering steadily.

What diseases is Poinsett resistant to?

Poinsett was bred for resistance to several common cucumber diseases, including downy and powdery mildew, anthracnose, and angular leaf spot. That makes it a reliable choice in hot, humid regions where leaf diseases usually cut cucumber crops short.

What size should I pick Poinsett cucumbers?

Slice Poinsett cucumbers at about 7 to 8 inches long, while the skin is still firm and dark green. Picking at this stage gives the best texture and flavor, and harvesting regularly before the fruit yellows keeps the vine setting new cucumbers.

Does Poinsett cucumber need a trellis?

A trellis is not required, but it helps. Training Poinsett up a support keeps the long fruit straight and clean, improves airflow to reduce disease, and saves garden space. Grown on the ground it still produces well, though some fruit may curve.

Ready to grow your own? Poinsett seeds give you dependable, disease-resistant vines loaded with long, crisp slicing cucumbers. For the full step-by-step, see our complete cucumber growing guide linked at the top of this page.

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By Maxim Kaufman — Founder & CEO, Organo Republic

Maxim founded Organo Republic in 2017 and personally selects, tests, and grows the heirloom, non-GMO varieties the company offers. Under his leadership, Organo Republic was named Agri Business Review’s Top Non-GMO Seed Variety Solution 2026.