Gourds (Cucurbitaceae)
When we talk about gourds, we refer to a broad group that includes pumpkins, melons, cucumbers, squashes, and zucchini. These plants come in many varieties, ranging from edible types to those grown primarily for ornamental and crafting purposes due to their hard shells. In this book, we will focus on edible gourds.
Planting and harvesting gourds
Planting and propagating
I recommend starting all gourds as seedlings in the greenhouse before transplanting them into the garden. Directly sowing seeds outdoors can be risky, as providing the ideal combination of warmth and moisture needed for germination may be difficult. Gourd seeds require a lot of moisture to sprout, but overly wet conditions can cause the seeds to rot. Additionally, young seedlings are highly vulnerable to pests like slugs, which can quickly destroy an entire plant overnight.
For this reason, it’s a good idea to protect newly transplanted seedlings by covering them with a fine mesh netting or another type of protective cover that allows sunlight in. This helps shield the plants from pests while they establish themselves. Transplant the seedlings into the ground once they have developed at least two true leaves (after creating the first two baby leaves), which indicates they are strong enough to handle outdoor conditions.
Gourds require soil rich in organic matter for healthy growth.
Seed collection is effortless in this case. Once the fruit is fully ripe, it will contain numerous seeds, each with the potential to grow into a new plant. To ensure healthy plants in the future, collect seeds from several different fruits, as this increases genetic diversity and improves the chances of vigorous, resilient plants.
When collecting seeds, wash them thoroughly to remove any pulp, as leftover pulp can lead to mold growth during storage. After washing, spread the seeds out to dry completely. Store the thoroughly dried seeds in a cool, dry place, and they will be ready for planting next season.
Spacing and sunlight
Zucchini plants develop large leaves and can either spread out on the ground or be trained to grow vertically on a support pole. It’s best to give them plenty of space to accommodate their size. I suggest planting each zucchini in a separate hole that is slightly deeper, allowing the soil to hold more water without touching the leaves. This helps prevent leaf rot and disease.
Other plants from the gourd family can be planted closer together, but digging a deeper trench for them is a good idea. This trench will help collect and retain water, ensuring the roots get adequate moisture. Just leave enough space for the plants to spread out and crawl, as these vining plants need room to grow freely.
Gourds prefer sunny and warm places to develop their flowers.
Watering
Gourds require a large amount of water throughout the entire growing season. Be sure to water directly at the base of the plant, ideally into a hole created in the soil, rather than spraying the leaves. This helps prevent mold and diseases, as the leaves and fruit can quickly rot if wet for too long.
I have encountered people often using supports for their fruit (this goes for melons and pumpkins), which prevents them from touching the ground and getting rotten. We can use a simple plastic fruit basket. I don’t do that, but I always check fruit if it’s still compact and not moldy or soft on the part where it touches the ground.
Harvesting
Zucchini and cucumbers are prolific and will continue producing fruits throughout the season, offering a steady harvest. For this reason, it’s best to collect fruits continuously to stimulate the plant to grow new fruit. Based on the variety, we can collect small fruit or wait until they grow bigger.
Pumpkins and melons, on the other hand, take longer to mature and typically produce fewer fruits per plant, but these fruits tend to be larger and require a longer growing period to ripen fully. For winter squash and pumpkins, test the skin with your fingernail. The gourd is ready if it’s hard and cannot be punctured easily. Stem Condition: Mature gourds often have a drying or browning stem, a good indicator of ripeness.
For all gourds – if a fruit is rotten or becoming yellow and wrinkly, remove it from the plant – it will not develop into an edible fruit and only takes energy from the plant.
Pollination
A key aspect of growing gourds is understanding their pollination needs:
- Gourds produce both male and female flowers, which require pollination by bees or other pollinators for fruit to develop. Male flowers do not produce fruit; only female flowers do.
- Male flowers can be harvested and eaten, but it’s essential to wait until they have fully bloomed and have been left on the plant for a few days to ensure pollination occurs. Removing them too early can prevent fruit from forming.
- Removing excess male flowers can be beneficial as it helps the plant focus its energy on developing the fruit.
Companion Planting and Interplanting with Gourds
The Three Sisters Method, an ancient planting technique, is likely familiar to you when discussing gourds and interplanting. This method involves growing corn, beans, and squash together. The corn acts as a natural support for the beans to climb, the beans enhance soil fertility by fixing nitrogen, and the squash (or other gourds) spread across the ground, providing shade that suppresses weeds. This method not only maximizes space but also enriches the soil and controls weeds, enlightening you about the wisdom of our ancestors in sustainable farming.
In addition to the Three Sisters Method, you can use ground covers like clover or vetch to control weeds and naturally enrich the soil with organic matter.
While I wouldn’t recommend heavy interplanting with other crops due to the extensive space gourds require, they can still benefit from careful companion planting. Choosing the proper companions can help control pests, boost pollination, and enhance soil health, making your gourd plants healthier and more productive.
Companion planting and interplanting with gourd plants:
Corn
Benefits: Corn provides natural shade and support for climbing gourd vines and significantly lighter gourds like cucumbers. In return, the gourd’s broad leaves help suppress weeds at the base of the corn stalks.
Planting Tip: Plant corn in clusters or rows, allowing the gourd vines to weave around the stalks.
Beans
Benefits: Beans are nitrogen-fixing plants, meaning they enrich the soil by adding nitrogen, which benefits heavy feeders like gourds. This pairing is part of the traditional “Three Sisters” planting method: corn, beans, and squash.
Planting Tip: Use pole beans for vertical growth alongside gourds to maximize space and soil nutrients.
Lettuce, spinach, and radishes are other plants ideal for interplanting with gourds. Radishes help deter cucumber beetles and can be used as a trap crop for pests, drawing them away from the gourds. Fast-growing, shallow-rooted greens can be interplanted with gourds to use early-season space before the gourd vines spread out. The broad leaves of the gourds later help provide shade, reducing bolting in hot weather—interplant lettuce or spinach between young gourd plants. Harvest the greens early before the gourds need more room.
Herbs and flowers, such as nasturtium, marigold, dill, basil, and oregano, can help gourds repel pests and attract beneficial insects such as bees and ladybugs. Because of this, they are ideal for companion planting.
Plants to Avoid Planting with Gourds
Potatoes are heavy feeders and compete for nutrients, potentially stunting the growth of gourds. They also attract similar pests, increasing the risk of infestations.
Onions and Garlic are significant pest deterrents for many plants; they can inhibit the growth of gourds due to root competition.
Other Vining Plants (e.g., Melons, Other Squashes) – planting multiple vining crops together can lead to overcrowding, increased competition for sunlight, and a higher risk of disease spread.
Harvest times
1. Zucchini (Summer Squash) Days to Harvest: 40–60 days.
2. Cucumbers Days to Harvest: 50–70 days.
3. Pumpkins (Small to Medium Varieties) Days to Harvest: 90–120 days.
4. Winter Squash (Butternut, Acorn, Spaghetti Squash) Days to Harvest: 80–120 days.
5. Luffa (Sponge Gourd)
- Days to Harvest for Edible Use: 60–90 days.
- Days to Harvest for Sponge Use: 120–150 days.