Easy and Fast Method for Planting and Growing Hybrid Fruit Trees of Watermelon and Longan
In recent years, the trend of hybrid fruit trees has gained significant popularity among gardeners and farmers. One unique and fascinating combination is the hybrid fruit tree of watermelon and longan. While these two fruits naturally belong to different plant families—watermelon being a vine and longan a tropical tree—modern grafting and planting techniques make it possible to grow them together. This guide will walk you through an easy and fast method to plant and grow hybrid fruit trees of watermelon and longan, using a creative combination of grafting, companion planting, and natural growth stimulation.
Understanding the Hybrid Concept
Before we dive into the step-by-step process, it’s important to understand that a true biological hybrid of watermelon and longan is not naturally feasible due to their genetic differences. However, grafting methods and shared root systems can allow these plants to grow in harmony on a shared planting medium, giving the appearance and function of a hybrid plant. This method is ideal for gardeners who enjoy experimenting with plants and want to grow multiple fruits in limited space.
Materials You Will Need
- One healthy longan sapling (about 1-2 feet tall)
- One mature watermelon seedling or vine
- Sharp grafting knife or razor blade
- Aloe vera gel (natural growth stimulator)
- Banana stem (as a natural root enhancer)
- Plastic grafting tape or cling film
- Organic compost and loamy soil
- Large planting container or raised bed
- Watering can or irrigation setup
Step 1: Preparing the Longan Tree Base
Start by selecting a healthy longan sapling. Make sure it has a strong main stem and no signs of disease. The longan tree will serve as the base or the “host” in this hybrid combination. Plant the longan sapling in a large pot or directly in the ground with rich, well-draining soil mixed with compost and banana stem. The banana stem will decompose and release natural nutrients that encourage faster root growth.
Step 2: Preparing the Watermelon Vine
Take a strong watermelon seedling that already has 3–5 leaves and a healthy root system. Watermelons grow rapidly, so timing is crucial. You want the seedling to be ready for grafting when the longan sapling has developed a slightly woody stem.
Apply a thin layer of aloe vera gel on the watermelon seedling’s stem. Aloe vera is a natural hormone booster that encourages faster healing and cell regeneration at the grafting site.
Step 3: Grafting Watermelon onto Longan
This method uses a side grafting technique, which is simple and effective.
- On the main stem of the longan sapling (around 6–8 inches from the soil), make a diagonal cut about 1 inch deep.
- Cut the stem of the watermelon vine into a matching “V” shape that fits snugly into the longan cut.
- Insert the watermelon stem into the longan stem cut.
- Wrap the joint with plastic grafting tape to secure it in place.
- Keep the grafted plant in a shaded area for about a week to allow the wound to heal and the graft to take.
Step 4: Care After Grafting
During the first 10–14 days after grafting, maintain moderate moisture in the soil. Avoid overwatering to prevent rot. Ensure the grafted site is not exposed to direct sunlight or strong wind, which can dry out the cut area.
After two weeks, check if the graft is successful. You’ll notice new growth from both the watermelon vine and longan tree. If the watermelon vine starts to grow while remaining connected, the graft was successful.
Step 5: Supporting the Watermelon Growth
Since watermelons are vines and produce heavy fruit, they need support. Install a small trellis next to the plant and gently train the watermelon vine to climb. Use soft ties or cloth to secure the vine without damaging it.
As the watermelon fruits begin to develop, use hammocks or slings made from cloth to support them. This prevents the fruit from pulling the vine or damaging the graft joint.
Step 6: Fertilizing and Stimulating Growth
For best results, feed your hybrid tree every two weeks with a balanced organic fertilizer. You can also apply banana peel tea and crushed eggshells around the base of the tree to improve flowering and fruiting. These natural fertilizers supply potassium and calcium—key nutrients for both watermelon and longan development.
Step 7: Harvesting and Pruning
Your watermelon fruit should be ready for harvest in about 60–90 days from planting. Use a sharp knife to cut the watermelon fruit carefully without disturbing the vine or the longan tree.
The longan tree will take longer—usually 2–3 years to bear fruit—but during this time, regular pruning and nutrient management will help it thrive. Once the longan tree starts flowering, continue with light feeding and reduce watering slightly to encourage fruit set.
Tips for Success
- Perform grafting during the early morning or late afternoon when temperatures are cooler.
- Use young, flexible stems for better success rates in grafting.
- Always sterilize your tools before grafting to prevent infections.
- Add mulch around the base to retain soil moisture and prevent weeds.
- Keep the plant protected from strong wind and heavy rain in the early stages.
Final Thoughts
Growing a hybrid fruit tree of watermelon and longan is not only a fun gardening experiment but also a great way to maximize space and enjoy the benefits of two delicious fruits from one plant system. While it requires attention and patience, the process is straightforward and suitable even for beginners who want to explore creative horticulture. With the right technique and care, you can enjoy a unique and fruitful harvest that amazes friends, family, and fellow gardeners.
