Growing watermelons in pots is a challenging but rewarding endeavor, especially for those with limited space. While it may seem like a daunting task, with the right variety, container, and care, you can enjoy sweet, juicy fruits in your own backyard. Here's a comprehensive guide to help you succeed, along with my personal insights and commentary.
The Right Variety
One of the most crucial decisions you'll make is choosing the right watermelon variety. For container gardening, opt for compact and bush varieties that are more manageable and produce smaller, but equally delicious, fruits. Personally, I find the 'Sugar Baby' and 'Bush Sugar Baby' varieties to be excellent choices, as they thrive in pots and produce good-sized watermelons. The 'Golden Midget' is another great option, offering a delightful balance of taste and size.
Container Selection
When it comes to pots, size matters. Watermelons have extensive root systems, so you'll need a large container to accommodate their growth. I recommend aiming for a 10-gallon pot for dwarf or compact varieties, but for safety, go for a 15 to 20-gallon pot that is at least 18 to 24 inches deep and wide. This provides ample space for the roots to develop and makes maintenance easier. Don't forget to check for drainage holes, as these are essential to prevent root rot.
Soil Preparation
Watermelons are heavy feeders, so using the right soil is vital. Combine a quality potting soil with compost at an 80:20 ratio for a rich, well-draining mix that provides essential nutrients. Personally, I find organic potting mixes like the one from Walmart to be excellent, but if you don't have homemade compost, you can buy bags of organic compost from places like Amazon. This blend ensures your watermelon plant gets the nutrients it needs to grow healthily in the container.
Planting
You have two options for planting: sowing seeds directly or buying transplants. I prefer the latter, as it reduces the risk of transplant shock. When planting seedlings, dig a large hole and carefully transplant them to avoid them getting pot-bound or shocked. If you're sowing seeds, keep the soil moist and thin them to keep the strongest one. Remember, watermelon plants can be trained to grow vertically, which is perfect for smaller spaces.
Sunlight and Watering
Watermelon plants need lots of sunlight and heat to develop sweet fruits. Place your container in a spot that gets 8 to 10 hours of sunlight each day and temperatures over 70°F. If you live in a cooler climate, consider growing watermelons in a greenhouse or cold frame to guarantee the required temperatures. As for watering, watermelons need a lot of it, especially in pots, so keep the soil consistently moist, checking it daily and watering if it feels dry. A soil moisture meter can be a helpful tool to ensure you don't overwater.
Fertilization
Watermelons are hungry plants, so regular fertilizing is crucial. If you added compost at planting, it will provide initial nutrients. Otherwise, use a balanced, slow-release fertilizer at planting, and switch to a phosphorus and potassium-rich product once the plant starts flowering. I find seaweed fertilizer or homemade comfrey fertilizer to be effective, applying them every two weeks during the summer. This ensures your watermelon plant gets the nutrients it needs to develop its vines and ripen the fruit.
Harvesting
Watermelons take 70-90 days from planting to harvesting. The signs that a watermelon is ready to be picked are a brown curly tendril near the fruit, a hard and matte rind, and a deep, hollow sound when tapped. When you find a fruit that ticks all these boxes, cut it from the vine with a sharp knife. Enjoy the sweet, juicy reward of your hard work!
In conclusion, growing watermelons in pots is a challenging but achievable goal. With the right variety, container, and care, you can enjoy the fruits of your labor in your own backyard. So, roll up your sleeves, get your hands dirty, and let the sweet, juicy rewards of your efforts be the sweetest watermelon you've ever tasted.
