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King of Hearts Watermelon

Gardening Guide: Wonderful Watermelon: How to Grow the Fruit that Means 'Summer'

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King of Hearts Watermelon

In this Plant Profile, get specific details, including the characteristics and best uses of King of Hearts Watermelon, one of our Plant Profiles featured in our Watermelon Collection.

By Norann Oleson

King of Hearts Watermelon

King of Hearts Watermelon

Seedless King of Hearts is an oval-shaped picnic melon that will feed an entire party. It has a thick, green rind that lets it store and travel well, with medium green stripes. This is one of the top long vine watermelons, which means it needs a lot of space to grow in.

Sun Exposure

  • Full sun

Soil pH

  • 6.1 to 7.5

Hardiness Zones

  • not frost hardy

Spacing

  • Vines need 8 to 10 feet of space

Moisture

  • Water deeply 1 to 1.5 inches per week
  • keep soil moist but not waterlogged

Notes

  • 80 to 85 days to harvest
  • Hybrid
  • Needs another variety to pollinate – recommend Sugar Baby
  • Seedless
  • Flesh is red, sweet and crisp
  • Weighs 10 to 20 lbs.

Have you grown King of Hearts watermelons? If so, tell us your top tips for ensuring a delicious harvest.

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TABLE OF CONTENTS

  • Curator’s Corner
  • Introduction
  • Feature Articles

  • Types of Watermelon Plants
  • Pollinating Watermelon Plants
  • Choosing the Right Variety of Watermelon
  • Growing Watermelon from Seeds or Seedlings
  • Growing Watermelon in Open Land, in Raised Beds, or on a Trellis
  • Soil, Sunlight, Fertilizer, and Water for Your Watermelon Plants
  • Watermelon Care: Pests and Disease
  • Harvesting Your Watermelons
  • Essential Tools and Equipment for Growing and Enjoying Watermelons
  • Plant Profiles

  • Desert King Watermelon
  • Black Diamond Watermelon
  • Yellow Doll Watermelon
  • Crimson Sweet Watermelon
  • King of Hearts Watermelon
  • Sugar Baby Watermelon
  • Recipes

  • Grilled Watermelon Salad
  • Fresh Mozzarella Watermelon Salad
  • Watermelon Rind Smoothie
  • Watermelon Fruit Rollups
  • Margarita Watermelon
  • Watermelon Juice
  • Easy Watermelon Sorbet
  • Grilled Watermelon and Pineapple Skewers
  • Additional Articles

  • Nutrition Facts about Watermelon
  • Home Remedies and Health Benefits of Watermelon
  • Resources about Watermelon
  • Watermelon Glossary

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