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Lettuce, Heatwave Blend

Short Description

Lettuce that keeps its cool in the heat, remaining productive and tasty longer.

Full Description

Feast both your eyes and your palate on lettuces that thrive in the heat and remain productive and tasty longer than all others. Our choice"slow bolt" varieties include green and red crisphead, green romaine and multiple textures and colors of looseleaf.
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Order: 1 Pkt. (1000 seeds)
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Product properties

Type Some flowers and vegetables fall into subcategories that may define how they grow (such as pole or bush), what they are used for (such as slicing tomatoes or shelling peas), flower type, or other designations that will help you select the type of a class of plant that you are looking for.


Days To Maturity The average number of days from when the plant is actively growing in the garden to the expected time of harvest.

50-60 days

Leaf Texture The typical height of this product at maturity.


Sun The amount of sunlight this product needs daily in order to perform well in the garden. Full sun means 6 hours of direct sun per day; partial sun means 2-4 hours of direct sun per day; shade means little or no direct sun.

Full Sun, Part Sun

Spread The width of the plant at maturity.

6 inches

Height The typical height of this product at maturity.

9-15 inches

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Fall Lettuce
Fall Lettuce
Fall is an ideal time to grow cools season lettuce favorites.
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How To Plant & Grow Lettuce
How To Plant & Grow Lettuce
Learn how to plant and grow lettuce from Burpee's expert horticulturist.
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  • Lettuce

    Start Indoors Start Indoors Starting seeds indoors is called Indoor Sow or Indirect Sow and these dates are when to sow seeds indoors in the spring or summer
    Transplant Transplant When to transplant bulbs or roots in the garden for spring
    Start Outdoors Start Outdoors Starting seeds outdoors is called Outdoor Sow or Direct Sow and these dates are when to sow seeds outdoors in the spring or summer
    Start Indoors Fall Start Indoors Fall Starting seeds indoors in the fall called Indoor Sow or Indirect Sow and these dates are when to sow seeds outdoors in the fall
    Transplant Fall Transplant Fall Transplant Fall-When to transplant bulbs or roots in the garden for fall
    Start Outdoors Fall Start Outdoors Fall Starting seeds outdoors in the fall is called Outdoor Sow or Direct Sow and these dates are when to sow seeds outdoors in the fall
    S S Succession Planting This means that the plants have multiple harvests in a season
    First Date: Apr-04 - Last Date: May-16
    First Date: Mar-07 - Last Date: Apr-04
    First Date: Aug-06 - Last Date: Sep-17
    First Date: Apr-04 - Last Date: May-16

How to Sow

  • Sow lettuce seeds in average soil in full sun in early spring for first crop. Sow in late summer for fall crop.
  • Sow every two weeks to extend harvests.
  • In late summer, sow in a protected are that stays below 75 degrees F.
  • Sow thinly in rows 12 inches apart and cover with ¼ inch of fine soil.
  • Follow the spacing recommended on the seed packet for specific varieties.
  • Firm lightly and keep evenly moist.
  • Seedlings emerge in 7-10 days.

How to Grow

  • Thin to stand 8 inches apart when seedlings are 1-2 inches tall.
  • Keep lettuce plants well watered during dry periods to promote rapid, uninterrupted growth.
  • Lettuce is shallow-rooted, so avoid disturbing the soil around the plants when weeding.
  • Unless there is regular rainfall, lettuce plants must be watered deeply at least once a week and more frequently during periods of drought.
  • Mulch with a layer of compost or clean straw to help the soil retain moisture.

Harvest and Preserving Tips

  • For the best quality, pick lettuce early rather than late as lettuce allowed to grow too long may be bitter and tough.
  • Try to harvest in the morning when the leaves are crisp, sweet, and full of moisture.
  • Harvest looseleaf types anytime the leaves are large enough to use.
  • Harvest butterhead types when they have formed heads and the leaves are a good size.
  • Cut the heads below the crown.
  • On leaf types, you can just pick a few leaves at a time, if you like.
  • Store for 5-7 days in a plastic bag in the refrigerator. Many gardeners wrap leaves in moist paper towels.
  • Lettuce is a classic ingredient in salads. It adds crispness to sandwiches and can be used as a garnish, braised, or added to soups. Many of the looseleaf cultivars are also decorative in the garden.
Days To Maturity
50-60 days
Leaf Texture
Full Sun, Part Sun
6 inches
9-15 inches
Sow Method
Direct Sow/Indoor Sow
Planting Time
Fall, Spring
Sow Time
2-4 weeks BLF
8 inches
Lettuce, Heatwave Blend is rated 4.2 out of 5 by 40.
Rated 5 out of 5 by from Great growing lettuce I’ve grown this lettuce 3 years in a row in containers on my deck. It grows fast and is sweet and delicious. I live in Florida and can grow it from October until May. Then it gets too blistering hot to grow anything.
Date published: 2019-11-17
Rated 1 out of 5 by from Waste of money unless..... Unless you can tolerate bitter don’t bother. I thought it was supposed to be milder in hot weather. It was bitter before hot weather arrived.
Date published: 2018-07-20
Rated 5 out of 5 by from Promises delivered We had a rough cold spring in KY so my seed got a slow start but once it went from Winter to SUMMER in two weeks, these really took off. I have so much lettuce that I gave it away in gallon bags. My family can't possibly eat all of it. It is a tender, flavorful lettuce mix that has a great variety of textures. Some of the varieties have bolted now (its late June) so I'll buy another packet, turn these over, and start over.
Date published: 2018-06-27
Rated 5 out of 5 by from Easy and delicious This year is my first time growing lettuce. I ordered the heatwave blend since I am in hot & humid VA and got my garden in late this spring. This lettuce grew quickly (so quickly none of my other vegetables are ready to harvest yet), and I have continuously had lettuce for salads for a couple weeks so far. It is growing great in all varieties and tastes awesome! In reading other reviews, I'm confident we'll have great lettuce throughout the summer and fall!
Date published: 2018-06-19
Rated 5 out of 5 by from Best Edible in my Garden last Summer I read a bunch of hipsters like to grow things in broken furniture pieces on their city rooftops. Being a frugal-minded and eco-conscious, I figured I’d give it a go. This Heatwave Blend didn’t disappoint, but don’t let the name fool you: this grows just as well in cool weather. I never thought I could grow food in my tiny city balcony garden but now that I have I’m a believer. Every couple days to a week, all I’d do is trim off a bit of lettuce for a salad and share with my roommates. The next week it was back again and no need to buy again. Didn’t even use all the seed. Finally got some use out of the ol’ salad spinner. I suppose I need to learn how to cut the lettuce such that I get all of it up (you can see in the photo some of the spillover which if left can spoil), but I had no problems with critters or bugs with this planted in a container off my balcony railing (next to a David Austin, squash, and another red tea rose bush. It kept growing all summer and through the fall until the first snow in November. Who says you cans garden in containers? Something so satisfying about growing your own food and I hope more city dwellers will try it!
Date published: 2018-03-12
Rated 5 out of 5 by from Great blend for hot weather I love growing this every year. My garden gets ZERO shade, so I need a lettuce that tolerates the heat. I sow this variety three times; as soon as it starts to bolt, it goes into the compost bins and I start a new batch. Pick it at night or first thing in the morning (morning is best) and it will never be bitter.
Date published: 2018-01-29
Rated 5 out of 5 by from Late summer treat First time I’ve ever had success with a late summer lettuce . Heat Wave is wonderful producer and great flavor. We’ve had an extra 4-5 weeks of salad lettuce since planted in early August. I’ll absolutely do the same next year. John in SW Pa.
Date published: 2017-10-15
Rated 5 out of 5 by from Fast growing Harvested my first salad only 38 days after sowing seed. Tender and delicious when leaves are 6-8 inches.
Date published: 2017-07-08
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