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A ripe Imperial 45 cantaloupe with heavy tan netting on the vine in a sunny garden

How to Grow Imperial 45 Cantaloupe From Seed

Updated July 2026

Imperial 45 is a classic netted cantaloupe and a dependable garden favorite. Its round, heavily netted fruit ripens to deep orange, sweet, and aromatic flesh on productive vines, giving you full-flavored melons in about 85 days. Here is what makes this variety special and how to get the best from it.

Quick start

Sow Imperial 45 seeds half an inch to an inch deep in warm soil, starting indoors 3 to 4 weeks early in cooler regions or direct-sowing once the ground is above 70F. Grow on a rich, mounded hill in full sun, thinning to the two or three strongest plants and giving the long vines 4 to 6 feet to sprawl. Expect ripe, netted cantaloupes in about 85 days. Harvest when the fruit slips easily from the vine, the netting turns tan, and the blossom end smells sweet.

Best tip

Imperial 45 is a productive, reliable cantaloupe, but it needs heat and a dry finish to reach full sweetness. Keep water steady while the vines run and the fruit sizes up, then ease off in the last week or two so the sugars concentrate. In cool-summer regions, start seeds indoors early and grow on black plastic to bank warmth, and always let bees pollinate freely by avoiding sprays during flowering.

At a glance

How to Grow Imperial 45 Cantaloupe From Seed — growing specifications at a glance
Botanical nameCucumis melo var. cantalupensis
Plant typeWarm-season annual vine
USDA zones3 to 12 (grown as a summer annual)
SunFull sun (8+ hours)
Days to maturity~85 days from transplant
HeightVines 6 to 8 ft long (or trellised)
Spacing18 to 24 inches apart; hills 4 to 6 ft
WaterDeep and even; ease off as fruit ripens

Uses

Imperial 45 is a classic dessert cantaloupe, best enjoyed fresh. Serve it in wedges or cubes, add it to fruit salads, wrap it in prosciutto, or blend the aromatic orange flesh into smoothies, sorbets, and agua fresca. Rich in vitamins A and C and wonderfully juicy, a single ripe melon is a highlight of the late-summer table.

Frequently asked questions

How long does Imperial 45 cantaloupe take to mature?

Imperial 45 ripens in about 85 days from transplant, making it a dependable mid-season cantaloupe. Start seeds indoors 3 to 4 weeks before your last frost, or direct-sow once the soil is warm, and you can expect sweet, netted melons by late summer.

How big are Imperial 45 melons and what do they taste like?

Imperial 45 produces classic round cantaloupes of about 4 to 5 pounds with heavy tan netting over a firm rind. Inside is deep orange, aromatic flesh with the sweet, musky, honeyed flavor gardeners expect from a top-quality netted melon.

How do I know when Imperial 45 is ripe?

Like other cantaloupes, Imperial 45 slips when ready: the stem pulls cleanly from the fruit with a gentle tug. Look for the netting to turn tan and corky, the background rind to shift from green to gold, and a sweet, fragrant aroma at the blossom end.

Any tips for growing Imperial 45 well?

Give Imperial 45 full sun, rich soil, and steady water while the vines run and fruit swells, then ease off watering in the final week or two so the melons finish sweet. Mulch under the fruit to keep it clean, and let bees do their work by avoiding sprays during flowering.

Ready to grow your own? Heirloom-quality Imperial 45 gives you sweet, netted cantaloupes all summer. For the full step-by-step, see our complete melon growing guide linked at the top of this page.

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Maxim Kaufman, Founder and CEO of Organo Republic

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.

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