How to Grow Watermelon Vertically

Growing Watermelon At Home – Growing watermelon hanging hammock

Why Grow Watermelons Vertically?

While traditional watermelon cultivation involves allowing the vines to sprawl across the ground, vertical gardening offers several advantages that make it an attractive choice.

Space-Saving Technique

One of the primary benefits of growing watermelons vertically is the efficient use of space. By training the vines to grow upwards, you can maximize your available gardening area, making it an ideal solution for small yards, urban gardens, or areas with limited growing space. This vertical approach allows you to cultivate a substantial crop without sacrificing precious ground real estate.

Improved Air Circulation

Vertical gardening promotes better air circulation around the plants, as the vines are elevated off the ground. This improved airflow helps prevent moisture buildup and reduces the risk of fungal diseases, which can be problematic in traditional watermelon cultivation where the vines are in direct contact with the soil.

Easy Maintenance

With watermelons growing vertically, tasks such as weeding, watering, and harvesting become more manageable. The plants are conveniently positioned at a comfortable height, reducing the need for excessive bending or kneeling. Additionally, the vertical arrangement makes it easier to inspect the plants for pests or diseases, allowing for prompt intervention if necessary.

Choosing the Right Watermelon Variety

Before embarking on your vertical watermelon growing journey, it's crucial to select the appropriate variety to ensure success.

The vine length and fruit size are two key factors to consider when choosing a watermelon cultivar for vertical gardening.

Vine Length

Opt for compact or bush varieties with shorter vines, as they are better suited for vertical growing. These varieties typically produce vines ranging from 3 to 6 feet in length, making them easier to manage and train on a trellis or support system. Some recommended compact watermelon varieties include Sugar Baby, Bush Sugar Baby, and Golden Midget.

Fruit Size and Weight

In addition to vine length, consider the size and weight of the watermelon fruits. Smaller or medium-sized varieties are generally more suitable for vertical gardening, as larger fruits can become too heavy and strain the vines or support system. Look for varieties that produce watermelons weighing between 5 and 15 pounds, such as Sweet Beauty, Yellow Doll, and Sugar Baby.

Setting Up the Vertical Growing System

To successfully grow watermelons vertically, you'll need to establish a sturdy support system that can accommodate the weight and growth habit of the vines.

There are several methods and materials you can use to set up your vertical growing system, each with its own advantages and considerations.

Trellis or Cage Construction

One popular approach is to construct a trellis or cage system using sturdy materials like wood, metal, or heavy-duty plastic. These structures provide the necessary support for the vines to climb and can be customized to fit your available space. Trellises can be freestanding or attached to a wall or fence, while cages are typically self-supporting and encircle the plant.

Using Slings or Hammocks

Another option is to use slings or hammocks made from breathable fabric or netting. These flexible supports cradle the developing watermelons, preventing them from dangling or putting excessive strain on the vines. Slings or hammocks can be attached to a trellis, fence, or other vertical structures, providing a secure and comfortable resting place for the fruits.

Materials Needed

To set up your vertical growing system, you'll need the following materials:

• Sturdy posts or frames for constructing the trellis or cage
• Trellis netting, wire mesh, or heavy-duty twine for the climbing surface
• Slings, hammocks, or netting for supporting the watermelons (optional)
• Stakes or anchors to secure the structure in place
• Pruning shears or scissors for vine maintenance

Planting and Training the Vines

Once you've chosen your watermelon variety and set up the vertical growing system, it's time to plant and train the vines.

Before planting, ensure that the soil is well-prepared by incorporating nutrient-rich compost or aged manure. Watermelons thrive in warm, well-draining soil with a pH range of 6.0 to 6.8.

Site Preparation and Planting

When planting, follow the recommended spacing guidelines for your chosen variety, typically allowing 2 to 3 feet between plants. Plant the seeds or transplants at the base of the trellis or cage, ensuring they receive ample sunlight and warmth for optimal growth.

Training the Vines

As the vines begin to grow, gently guide them onto the trellis or cage system, using soft plant ties or clips to secure them in place. Be careful not to damage or constrict the vines during the training process.

Pruning and Thinning

To encourage healthy growth and fruit production, regular pruning and thinning are essential. Remove any excess lateral vines or side shoots, allowing the main vines to focus their energy on producing fruits. Additionally, thin out the watermelon fruits when they are still small, leaving only the healthiest and most promising ones to develop fully.

Care and Maintenance

Providing proper care and maintenance is crucial for ensuring a successful vertical watermelon harvest.

Consistent watering, fertilization, pest management, and support for the developing fruits are all essential components of caring for your vertically grown watermelons.

Watering and Fertilizing

Watermelons have high water requirements, especially during the fruiting stage. Aim to keep the soil consistently moist but not waterlogged. Consider using a drip irrigation system or soaker hoses to efficiently deliver water directly to the root zone.

Regarding fertilization, incorporate a balanced, slow-release fertilizer into the soil before planting, and supplement with periodic applications of a water-soluble fertilizer throughout the growing season.

Pest and Disease Management

Vertically grown watermelons are not immune to pests and diseases, but their elevated position can reduce the risk of certain issues. Keep a watchful eye for common watermelon pests like aphids, cucumber beetles, and squash vine borers, and take appropriate measures to control them using organic or chemical methods, as needed.

Additionally, be vigilant for signs of fungal diseases like powdery mildew or anthracnose, which can be exacerbated by poor air circulation or excess moisture.

Fruit Support and Rotation

As the watermelons develop and increase in size, they may require additional support to prevent them from breaking the vines or falling off the trellis. Use slings, hammocks, or netting to cradle the fruits and distribute their weight evenly.

Additionally, consider rotating the watermelons periodically to ensure even exposure to sunlight and prevent lopsided growth or discoloration.

Harvesting and Storage

Knowing when to harvest and how to properly store your vertically grown watermelons is essential for enjoying their sweet, juicy flavors.

Signs of Ripeness

There are several visual and tactile cues that indicate when a watermelon is ripe and ready for harvesting:

• The underside (where the watermelon rests on the ground or support) develops a creamy or yellow color, known as the "ground spot."
• The rind develops a dull, matte appearance, losing its glossy sheen.
• The watermelon becomes heavy for its size.
• The curly tendril near the stem turns brown and dries up.

Harvesting Techniques

When harvesting, use a sharp knife or pruning shears to carefully cut the stem, leaving a few inches attached to the watermelon. Avoid pulling or twisting the watermelon, as this can damage the vine or remaining fruits.

To safely remove the watermelon from the vertical support system, gently lift it off the sling or hammock, or carefully untie it from the trellis. Handle the fruits with care to prevent bruising or damage.

Storage and Shelf Life

Properly stored watermelons can remain fresh and flavorful for several weeks. Keep them at room temperature for up to a week or refrigerate them for longer storage, up to three weeks.

Whole, uncut watermelons will last longer than cut ones, so it's best to refrigerate any leftover slices or wedges and consume them within a few days.

Conclusion

Growing watermelons vertically is an innovative and space-saving technique that offers numerous benefits for gardeners.