The Best Time to Plant Carrots for a Sweeter, More Abundant Harvest

Carrots are the backbone of a vegetable garden. They're relatively easy to grow, they don't take up too much space, and you won't have to wait forever for a strong harvest. However, like anything in your garden, timing is everything—you'll want to plant your carrots at the right moment to guarantee their success.

Here, we spoke with experts to take some of the guesswork out of it. Read on to learn the best time to plant carrots, when you shouldn't plant them, and how the pros recommend caring for them.

When to Plant

Carrots are happiest in cool weather, so avoid planting them amidst summer's most sweltering temperatures. Exact timing depends on where you live, and what the overall climate is like. However, the following provides an outline:

• Zones 3 to 6: Start seeds in April—in early to mid April for zones 3 and 4, and in late April for zones 5 and 6.
• Zones 7 to 8: Start seeds in early March.
• Zone 9: Start seeds in early January.
• Zones 10 to 11: Start seeds in February or early March.

Carrots will sprout most easily in soil that's cool, but not too cold, says Tammy Sons, founder of TN Nursery. She recommends a soil temperature between 55 and 75 degrees Fahrenheit. If properly cared for, your carrots will be ready to harvest in about 60 to 80 days.

Cooler weather is important for flavor, too. "Carrots tend to be sweeter when grown in mild temperatures, rather than intense heat," says Elin Harryson, plant expert at Planta.

Varieties

In addition to your local climate, it's important to also consider the type of carrot you want to grow. Certain varieties will prefer an early spring planting window, while others will thrive in the fall.

Here's what Harryson recommends:

• Short or round varieties: Plant in early spring in heavier soils.
• Long varieties: These require a longer growing window and need deep, loose soil.
• Heat-tolerant varieties: These can be planted a bit later in spring, as they can tolerate warmer conditions.

When Not to Plant

Avoid planting carrots when the weather is too warm. Ideally, the soil temperature should be between 55 and 75 degrees Fahrenheit. If it's too hot, the soil will dry out too quickly, and carrots won't sprout well. Sweltering temperatures can also make them taste bitter, says Sons.

However, planting carrots when it's too cold can have adverse effects, too. "Seeds won't germinate well in very cold, wet conditions," adds Harryson. So keep an eye on your last frost date and the soil temperature. This will yield the best results.

Related Stories

8 Vegetables You Should Never Plant Near Your Carrot Crop

The Best Time to Harvest Carrots for Peak Flavor and the Perfect Crunch, Say Experts

How to Plant

Once you've got the timing down, planting carrots is pretty straightforward.

"I like planting in the morning or late in the afternoon because the ground won't dry out as quickly," says Sons. However, the time of day doesn't matter too much.

Harryson recommends these steps for a successful carrot crop:

1. Prepare the soil. Loosen it about 8 to 12 inches deep, removing rocks and clumps. Mix in compost.
2. Cover the rows with cardboard or wooden planks to retain moisture and provide shade. Remove them when the first sprout appears. 
3. Create shallow rows about 1/4 inch deep and sow seeds thinly.
4. Cover lightly with soil.
5. Water gently and keep the soil consistently moist.
6. Once seedlings are a few inches tall, thin them to 2 to 3 inches apart.

Care Instructions

Make sure to keep the soil during the germination process. "This is critical, as it can take one to three weeks," adds Harryson.

Water your carrots consistently. Make sure the soil is moist but not wet—uneven watering can result in cracking or tough roots, she says.

Also, make sure to weed diligently after planting. Carrots don't compete well early on, and you want to set them up for success.