How to Grow Cucumbers: When to Plant Cucumbers in the US

Updated October 2026

Spring and fall growing, disease-resistant varieties, and trellising for clean, sweet fruit

What it looks like as it grows

🌱 Plant profile: Cucumber, with sowing times for your region, companion plants and common pests.

When to Plant Cucumbers in Your Region

Cucumbers are frost tender and thirsty. The North sows them once, after the last frost. North Florida and the Gulf South plant in spring and again from July to September, and South Florida grows them from September to March. These are the planting months for each of our 18 regions, with each region's frost window. Each region links to its full vegetable planting calendar, and the Cucumber plant page shows the calendar for any region you pick.

The Pacific Northwest, the Northeast and New England, the Midwest, the Upper Midwest and the Mountain West plant cucumbers in May and June. North Florida and the Gulf South plant cucumbers in March and April, and July to September. Southern California and Northern California plant cucumbers between March and July. The Mid-Atlantic and the Southern Plains plant cucumbers between May and July.

When to plant in Florida

Cucumbers need warm soil above 70 degrees to germinate but suffer in the deep heat and humidity of midsummer. Time plantings for the milder shoulders so the vines fruit before the worst disease pressure arrives.

Position and soil

Give cucumbers full sun, at least six hours a day. They are heavy feeders and drinkers, so work in plenty of compost or aged manure before planting. Aim for rich, well-drained soil with a pH around 6.0 to 7.0. Florida's sandy soils drain fast, so mulch and steady water matter even more here.

Sowing and planting

Cucumbers dislike cold soil and root disturbance. You have two options:

• Direct sow: push seeds about 1 inch deep into warm, prepared soil. This is the simplest method and avoids transplant shock.
• Raise transplants: start seeds in cells three to four weeks before your window, then set them out gently once the soil is warm. Use larger cells so you barely disturb the roots.

Seeds germinate in about 7 to 10 days in warm soil, and most varieties fruit in 50 to 65 days.

Spacing and support

Spacing depends on the type. Trellised vining cucumbers grow up, so they sit closer together, about 12 to 18 inches apart in a row. Bush types sprawl sideways and need about 18 to 24 inches. Use the calculator above to match your bed.

Vining types crop better on a trellis. A panel of netting or wire mesh 5 to 6 feet tall is plenty. Cucumbers climb with tendrils and grab any thin support. Growing up gives clean, straight fruit and the airflow that fights downy and powdery mildew, and it saves space. If you grow on the ground, mulch heavily so fruit sits on straw, not bare soil.

Watering and feeding

Even moisture is the single biggest factor in sweet fruit. Cucumbers are mostly water, and any swing from bone dry to soaked shows up as bitter, misshapen fruit. Water deeply, keep the soil evenly moist, and mulch to hold it. Water at the roots in the morning so leaves dry quickly, which also slows mildew. Feed every two weeks with a liquid fertilizer once flowering starts.

Pollination

Most cucumbers carry separate male and female flowers on the same plant. Bees move pollen between them, and the female flowers are the ones with a tiny cucumber behind the bloom. Early on, plants throw mostly male flowers, so be patient. Avoid spraying open flowers so you do not harm bees. If pollinators are scarce, hand pollinate with a small brush. Some varieties are parthenocarpic and self-set without pollination.

Varieties for Florida

Common problems

Pickleworm

This caterpillar bores into the fruit, leaving a small hole and sawdust-like frass. Grow in the cooler shoulders, cover young plants with row cover until flowering, and remove and destroy infested fruit.

Downy and powdery mildew

Both thrive in Florida humidity. Choose resistant varieties, trellis for airflow, water at the roots in the morning, and remove affected leaves. A milk spray of one part milk to nine parts water helps early on powdery mildew.

Bitter fruit

Caused by stress, mostly uneven water and heat. Keep the soil evenly moist, mulch, feed regularly, and pick young. If a fruit is bitter, peel it from the blossom end toward the stem.

Poor fruit set

Early plants make mostly male flowers, and poor bee activity leaves female flowers unpollinated. Be patient, avoid spraying flowers, and hand pollinate if needed.

Harvest

Pick young and often. Oversized cucumbers turn bitter and seedy and slow the vine down. Daily picking at peak keeps production high and the fruit crisp.

What to Plant with Cucumbers

Our companion data lists these plants as good neighbors for cucumbers, and these to keep apart. The lists read both ways, so a plant that names cucumbers as a companion appears here too. The full companion planting chart for vegetables has the same lists for 55 crops and prints on one sheet.

• Good companions for cucumbers: Beans, Marigold, Nasturtium, Peas, Radish, Snow Peas, Sunflower, Sweet Corn.
• Keep cucumbers apart from: Aromatic herbs, Potato, Sage.

Cucumbers at a glance

The planting figures for cucumber from our plant data, converted to inches and Fahrenheit.

Sowing cucumber seed

Sow cucumber seed about 3/4 inch deep into warm soil, either directly or in trays you transplant gently, because the roots dislike disturbance. Our plant data gives a soil temperature range of 64 to 86°F and about 7 days to emerge. Space plants about 20 inches apart and train vining types up a trellis, which saves space, keeps the fruit clean and improves airflow against mildew.

Growing cucumbers in containers

Cucumbers grow in a pot at least 12 inches across with a small trellis. See how to grow cucumbers in a pot.

How long do cucumbers take to grow?

Our plant data allows about 60 days from sowing to the first fruit. Pick when the fruit is firm, evenly green and full sized for the variety, before it yellows or fattens, and cut the stalk rather than pulling. Regular picking keeps the vines producing. Uneven watering is the usual cause of bitter or misshapen fruit; see why cucumbers turn bitter.

Frequently Asked Questions

Source: UF/IFAS Florida Vegetable Gardening Guide (SP 103); UF/IFAS Gardening Solutions.

See also: Cucumbers in the plant library →

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