When To Plant Cowpeas

The best time to plant cowpeas is after the last frost has passed and the soil has warmed to at least 65°F.
 
Timing when to plant cowpeas is critical because these heat-loving legumes simply won’t thrive in cold, damp ground.
 
If you plant cowpeas too early, the seeds can rot in the soil, and if you plant them too late, you might not get a full harvest before autumn chills arrive.
 
In this post, we’ll dig into the ideal window for planting cowpeas, how soil temperature affects your success, and regional tips to help you know exactly when to plant cowpeas in your garden.
 
Let’s get those cowpeas growing.
 

When To Plant Cowpeas: The Perfect Window

When to plant cowpeas really comes down to that sweet spot in late spring or early summer.
 
For most gardeners, the best time to plant cowpeas is about two to three weeks after your last expected frost date.
 
This gives the soil ample time to warm up, which is exactly what cowpeas crave.
 
Soil temperature is the single most important factor when deciding when to plant cowpeas.
 
If the soil is below 65°F, those cowpea seeds will sit there and sulk instead of sprouting.
 
You can plant cowpeas as late as midsummer in many regions, and they’ll still produce a solid crop before the first fall frost.
 
So when to plant cowpeas isn’t just a single date, it’s a flexible window that runs from late spring through early summer.
 

Soil Temperature Is Your Guide

The best time to plant cowpeas is when the soil temperature consistently hits 65°F to 85°F.
 
You can check this with a simple soil thermometer, or you can watch for nature’s clues.
 
When the nights are warm and the morning dew isn’t heavy and cold, that’s a good sign it’s time to plant cowpeas.
 
If you’re the impatient type, you can warm the soil ahead of time by covering it with black plastic for a week or two.
 
This trick lets you plant cowpeas a bit earlier than your neighbors, which is always fun.
 
But remember, cowpeas are tropical natives, so they’re happiest when it feels like summer outside.
 

Day Length and Sunlight for Cowpeas

When to plant cowpeas also depends on how much sunlight your garden gets.
 
Cowpeas need full sun, which means at least six to eight hours of direct sunlight each day.
 
The longer the days are when you plant cowpeas, the more energy those plants will have to produce pods.
 
That’s why the longest days of June are often the absolute best time to plant cowpeas.
 
If you’re in a northern climate, you’ll want to plant cowpeas as soon as the danger of frost is gone to take advantage of those long summer days.
 
In southern climates, you can plant cowpeas a little later because your growing season is longer and hotter.
 

Regional Timing for Planting Cowpeas

When to plant cowpeas changes depending on where you live, but the principles stay the same.
 
Here’s a breakdown by region to help you nail down the best time to plant cowpeas in your neck of the woods.
 

Southern States (Zone 7 and Warmer)

If you’re in the South, you’re in cowpea paradise.
 
You can plant cowpeas as early as April, and you can keep planting cowpeas every two weeks right through July.
 
This staggered approach gives you a continuous harvest of tender pods all summer long.
 
The soil warms up fast down South, so when to plant cowpeas is rarely a stressful decision.
 
Just make sure you plant cowpeas after all risk of a late frost has passed, which is usually by early April.
 

Northern States (Zone 6 and Cooler)

Up North, you’ll need to be more patient when deciding when to plant cowpeas.
 
The best time to plant cowpeas in cooler regions is usually late May or early June.
 
You’re waiting for both the frost to leave and the soil to warm, which can take a while.
 
If you plant cowpeas too early up North, they’ll just sit in the cold soil and rot.
 
To extend your season, look for early-maturing cowpea varieties that can handle a shorter window.
 
And don’t forget to plant cowpeas in the warmest, sunniest spot you have to give them every advantage.
 

Coastal and High-Altitude Areas

Coastal areas with fog and high-altitude gardens both have cooler summer temperatures, which affects when to plant cowpeas.
 
In these spots, the best time to plant cowpeas is typically mid-to-late June.
 
You’re waiting for the soil to hit that 65°F mark, which happens later than in inland valleys.
 
You can cheat a bit by using raised beds or containers, which warm up faster than ground soil.
 
This way, you can plant cowpeas a couple of weeks earlier even in tricky microclimates.
 

Tips for Success When You Plant Cowpeas

Once you’ve figured out when to plant cowpeas, you’ll want to set them up for a great season.
 
Here are some practical tips to keep in mind.
 

Pick the Right Cowpea Variety

Different cowpea varieties have different maturity times, which affects when to plant cowpeas for a fall harvest.
 
If you know you’re planting cowpeas late, choose a fast-maturing variety that’s ready in 60 to 70 days.
 
For earlier planting, you can go with longer-season cowpeas that take 80 to 90 days.
 
The variety you choose basically sets your calendar for when to plant cowpeas.
 
Always check the seed packet for days to maturity so you can count backward from your first frost date.
 

Plant Deep Enough for Strong Roots

When you plant cowpeas, sow the seeds about one inch deep.
 
Space them two to four inches apart in rows that are two to three feet apart.
 
Planting cowpeas at the right depth ensures the soil around them stays warm and moist.
 
If you plant cowpeas too shallow, they might dry out, and if you plant them too deep, they might not have the energy to push through.
 
One inch is the sweet spot for almost all soil types.
 

Water Wisely After Planting Cowpeas

Right after you plant cowpeas, water them gently but thoroughly.
 
The goal is to keep the soil consistently moist until those seeds sprout, which usually takes 7 to 10 days.
 
Once the cowpeas are up, they’re quite drought tolerant.
 
You should reduce watering to about one inch per week, and let the soil dry out slightly between waterings.
 
Overwatering cowpeas can lead to root rot, so err on the side of less water once they’re established.
 

Consider Succession Planting Cowpeas

Instead of planting cowpeas all at once, try succession planting.
 
This means you plant cowpeas every two to three weeks over your planting window.
 
So if you live in a warm region, you might plant cowpeas in May, then again in June, and once more in July.
 
This keeps your harvest coming in waves rather than all at once.
 
It’s a great way to have fresh cowpeas all season long.
 

So, When Exactly Should You Plant Cowpeas?

You should plant cowpeas when the soil is warm and all danger of frost has passed.
 
The best time to plant cowpeas is generally two to three weeks after your last frost date.
 
You can plant cowpeas successfully as long as the soil temperature is above 65°F.
 
Remember, if you’re wondering when to plant cowpeas, just wait until the ground feels warm to the touch and the evenings are mild.
 
When to plant cowpeas is really about patience and paying attention to your local weather patterns.
 
Now that you know when to plant cowpeas, you can get out there and grow a fantastic crop.
 
Happy planting, and enjoy those delicious cowpeas fresh from your garden.