Short answer: Watermelon grows well in the northern savanna during the rains and on irrigated plots further south in the dry season, but the fruit is heavy and sensitive to wet soil. Space vines about two metres apart between rows, lift the fruit off the ground, and keep sprays away from the flowers so bees can work. Harvest by the dried tendril, the yellowed ground spot and the skin, and confirm variety and planting dates with your district MoFA office.
Key takeaways
- Plant with the water you have: rain-fed sowing in the north, irrigated sowing in the dry season further south.
- Make the fruit set the first priority, because a vine with no visits from bees gives you flowers and no melons.
- Lift fruit onto straw or dry grass early, so the underside does not sit in wet soil and rot.
- Limit each vine to two or three good melons, and cut off the rest while they are still small.
- Harvest by the tendril, the ground spot and the skin, and keep chickens and goats away from young vines.
The flowers decide the crop, not the vines
The most common reason a watermelon field disappoints is that the flowers were never visited. Vines can look green and vigorous for two months and still produce a handful of fruit, because each melon needs pollen carried from the male flowers to the female flowers, and most of that work is done by bees.
Female flowers have a small swelling at the base, which is the immature fruit. Male flowers have a plain stalk and no swelling. Walk the rows in the morning when the flowers open and you will see bees working the male flowers first. If you see few bees, or none, the problem is usually a spray, a dusty field or a planting that is too far from any hives or wild pollinators.
Hand pollination is a practical fallback on small plots. Pick a freshly opened male flower early in the morning, peel back its petals and dab the pollen onto the stigma of a female flower the same morning. It takes time, but a small plot can be saved this way when the bees are scarce.
Spray only when you must, and never at the open-flower stage in the morning. Check the label for bee safety and ask your district MoFA office or plant protection staff which products are approved for watermelon in Ghana. Our guide to linking poultry with crops and fish covers how farms plan around bees, birds and crops on one holding.
Choosing a planting window by zone and water supply
Watermelon is a warm-season crop that needs sun, heat and steady water while the fruit fills. The northern savanna has a single long rainy season, usually from around May or June to September or October, and most growers there sow at the start of those rains. The middle belt and forest transition have two rain peaks, and the coast has a short and a long dry spell, so the timing shifts by location. Sowing in the dry season is common on the coast and in the south, but only if you can water the plot through the whole cycle.
The rains are not a guarantee. Dry spells in the first month can kill young seedlings, and heavy rain during ripening splits the fruit and dilutes its sweetness. Watch the forecast in your area, and talk to your district MoFA office about whether the rains in your zone have been reliable in recent seasons. Agricultural research stations, including the Savanna Agricultural Research Institute in Tamale, publish trial results for northern conditions that are worth asking for. If your rains are unreliable and you want a crop that sits in the same window, the ginger guide covers a partly shaded crop that can share the wetter months.
For a dry-season crop, plan the water before you plant. A borehole, a dugout or a river pump will carry you only if the flow holds through the final weeks, when the fruit is filling and the vines need the most water.
Seed and variety: read the packet before the market
Buy certified seed from a supplier who can name the variety and show you the germination rate and the days to maturity. Watermelon varieties differ a great deal. Some are sprawling, large-fruited types that need space, others are smaller, earlier and easier to fit into a tight plot. Seeded and seedless types also behave differently, and seedless varieties need a seeded pollinator planted in the same field.
Days to maturity on the packet are the best guide to when your crop will be ready, and they are measured from sowing rather than from flowering. Most varieties reach harvest somewhere between about 70 and 90 days after sowing, but the range matters more than the average. A variety that matures in 70 days lets you plan a second crop in the same season, while a longer one may run into the dry spell or the rains at the wrong time.
Ask a second question about any variety you are considering: how well does it hold its quality in your market? A melon that cracks on the way to town is a loss, however sweet it is. Your extension officer can tell you which types the local market wants and which ones have been tested on farms near you.
Mounds, spacing and the 2,000 square metre plot
Most growers raise the soil into mounds or ridges before sowing. A mound about 30 cm high gives the roots better drainage and warms the soil faster in the early weeks, which helps seedlings get away quickly. Plastic mulch is also used on commercial plots to keep the fruit clean and to hold soil moisture, but it adds cost and needs careful laying, so check whether it pays on your site before you buy the roll.
A common planting pattern for sprawling varieties is rows about two metres apart with plants about one metre apart in the row. That gives roughly one vine for every two square metres. On a 40 by 50 metre plot, which is 2,000 square metres, that comes to about 1,000 vines. Smaller varieties can be planted closer, and your seed supplier or extension officer will tell you what spacing their variety needs.
Sow two or three seeds to a mound, then thin to the strongest one or two plants once they have established. Keep the plot clear of weeds from the start, because a weed-free first six weeks does more for yield than any feeding programme I know of. If you are building the soil before planting, the poultry manure guide explains how to rot and spread manure on the mounds without burning the young roots.
The crop stage by stage
The table gives the typical rhythm of a watermelon crop. Use it as a checklist to plan your labour and water, and adjust the dates to your variety and your site. Every stage has one main job, and skipping it is where the losses come from.
| Stage | Typical timing | Main job |
|---|---|---|
| Sowing or transplanting | Start of the rains, or the start of dry-season irrigation | Sow on mounds, keep the seedbed moist, and protect young plants from birds and insects |
| Vine growth | First four to six weeks | Weed hard, water regularly, and check for aphids and early virus symptoms |
| Flowering | About five to six weeks after sowing, depending on variety | Keep bees working, avoid spraying in the morning, and hand pollinate if bees are scarce |
| Fruit set and filling | Roughly one to two weeks after flowering | Lift fruit onto straw, keep two or three melons per vine, and keep water steady |
| Ripening | Roughly 70 to 90 days from sowing, varying by variety | Reduce irrigation so the sugar builds, and watch for ripeness signs |
| Harvest | When the tendril dries and the ground spot turns yellow | Cut the melon from the vine with the stalk attached, and grade in shade |
These timings are typical examples, not a promise. Confirm the flowering and ripening windows for your variety with the seed supplier and your agric extension officer, and keep your own records so next season's plan starts from your farm.
Watering through to the fruit filling stage
Watermelon is roughly 92 per cent water, but the plant does not want a flood. It wants a steady supply at the root zone while the vine grows, then a slightly tighter schedule as the fruit ripens. Too much water in the last ten days dilutes the flesh and can split the skin, so the timing of the cut-back matters as much as the watering itself.
Drip irrigation or a furrow system keeps the foliage dry and puts the water where the roots are. Overhead sprinklers wet the leaves, invite powdery mildew and anthracnose, and can wash pollen off the flowers. If you use sprinklers, water early so the leaves dry before dusk.
Check the soil two or three centimetres below the mound before each watering. If it is damp at that depth, leave it. If it is dry and crumbles in your hand, water it deeply and then wait for it to dry back slightly before the next round.
Keeping the fruit clean, dry and off the ground
A melon lying on wet soil rots on the underside, and the rot is often invisible until you cut into it at the buyer's stall. Lift each young fruit onto a bed of dry straw, grass or sacking as soon as it reaches the size of a fist. Turn the fruit gently every week or two so it does not develop a flat, scarred patch where it sits.
Weeding is the other half of the job. Watermelon vines are wide, but they do not cover the ground fast enough to stop weeds in the first six weeks. Hoe between the mounds and hand-weed along the row. Once the canopy closes, the weeds struggle, and a clean plot is easier to scout for pests and virus symptoms.
Remove any fruit that splits, shows soft spots or sits in standing water. Taking it out early stops the rot from reaching the healthy melons next to it.
Pests, virus and wilt to scout for
Scout the plot every few days, and walk the rows rather than standing at the edge. Turn leaves over, check the undersides of the young growth, and look at the fruit closely for lesions. Most of the trouble on watermelon starts small and spreads along the row.
- Aphids on the young shoots and leaf undersides. They carry virus between plants, so control them early and pull out vines that show mosaic patterns.
- Whitefly on the leaves, which also spread virus in some seasons. Watch for sticky leaves and a yellow tinge.
- Fusarium wilt: a vine that wilts in the heat while the soil is still moist, often with brown streaks inside the stem at the base.
- Anthracnose and powdery mildew on the leaves and stems, worst in humid weather or where the leaves stay wet.
- Fruit rots on the underside, where fruit has sat on wet soil or has been bruised by the cutting tools.
Rotate watermelon out of the same field for several seasons where wilt has appeared, and clear infected vines from the plot rather than composting them in the field. For any spray, check the registered products and the withholding period with your plant protection officer before you buy.
Need chicks for your next batch?
Send breed, number and town. We reply with price, hatch date and delivery cost in writing.
How many melons to keep on each vine
A vine can set many fruit, but it cannot feed them all well. Keeping every fruit gives you a field of small, pale, unsaleable melons. The usual practice is to keep two or three good fruit per vine and remove the rest while they are still small enough to pull off without tearing the stem.
Choose the fruit that is set first on the main vine, because it is usually the healthiest and gets the most leaf area behind it. Pinch the growing tip of a vine once it has set its chosen fruit, so the plant puts its energy into filling them. Do not strip the leaves, because leaves are what feed the fruit.
Check the variety notes on how many fruit it should carry, since larger types often carry fewer and smaller ones can carry more. Your extension officer can help you work out the right number for the variety on your plot.
Harvest: the tendril, the ground spot and the skin
Harvest is the step that decides whether the season paid off, and guesswork costs money. Watermelon does not ripen after it is cut, so the timing has to be right on the vine. Three signs together are more reliable than any one of them on its own.
- Look at the tendril nearest the fruit stalk. When it has dried and turned brown, the fruit is usually near ripe.
- Check the ground spot, the patch where the fruit rests on the soil. It should change from white or pale green to a clear yellow.
- Look at the skin. It should dull a little and lose its sheen, and the stripes should stand out.
- Tap the fruit and listen. A ripe melon gives a deeper, duller sound than an unripe one, though this takes practice.
- Cut the melon from the vine with a sharp knife and leave a short stalk attached.
- Grade the fruit in shade, and set aside any with cracks, soft spots or sunburn for local sale.
Harvest in the cool of the morning where you can, and do not stack fruit high on a truck in the sun. Bruised melons rot faster on the way to market, and a bruise under the skin is a loss you will not see until the buyer does.
Selling whole fruit: markets, roadside stalls and festive peaks
Watermelon sells whole, cut into slices, or as juice, and each route has its own buyers and its own packing needs. Markets in the north and the towns along the main roads handle much of the trade, and some growers sell directly to trucks that move fruit south. Ask buyers which grades they take, how they want the fruit delivered, and how many melons they can clear in a week.
I will not quote watermelon prices, because they swing with the harvest across the region, the weather and the transport cost on the day. Check current rates in the market you plan to supply, and ask your buyer what the last few loads sold for rather than relying on a figure from a friend. Demand usually rises around Christmas, Easter and the Eid festivals, when families host and buy fruit in bulk.
Keep a record of every load: date, number of fruit, average weight, grade, buyer and the rate paid. Those figures will tell you more about your next season than any general advice. Many growers also run a leafy crop for the same town buyers, and our lettuce guide shows how a second crop can share the same delivery day.
Watermelon on a mixed farm with birds and goats
Mixed farms are common among our chick buyers, and watermelon can sit on one well when the animals are kept in their place. Chickens will attack young seedlings, peck at ripening fruit and dig up mounds, so keep the plot fenced until the vines have covered the ground. Goats will eat the vines and the leaves, and a single night in the wrong field can strip a row.
Vines and rinds are not the same as a balanced feed. Spent vines can go to goats in small amounts, and the rind is a treat rather than a ration for birds. Feed any plant material in moderation, watch the droppings and appetite, and follow your vet's or extension officer's advice on what your animals can take. Keep the vines out of the feed bins, and compost the rest on the mound edges.
Watermelon also sits well after a legume in the rotation. Our guide to mucuna and cover crops explains how a legume can leave the soil in better shape for the next cucurbit crop, and the same ground can then carry a flock on the paddock side of the farm. If birds are part of the plan, our breed guide helps you pick types that suit a farm where birds and crops share land, and the partner page explains how we work with farms that run both.
A 2,000 square metre plot in numbers
These sums use a 40 by 50 metre plot, two-metre rows, one-metre spacing in the row, and two or three seeds per mound thinned to one or two plants. They are arithmetic, not a yield forecast, and your varieties and water will decide the real outcome.
- Vines on the plot: about 1,000 at the 2 by 1 metre pattern.
- Seed: check the number of seeds per hectare or per plot with your supplier, because seed count and germination vary by variety.
- Fruit: plan for two or three per vine on the main shoots, which puts a ceiling on the count before you start.
- Labour: weeding in the first six weeks, scouting every few days, and a harvest that needs a few people for a few mornings.
Put your own water, seed and labour rates against those counts. The first season is the one where you learn your ground, so write everything down and keep the plan small enough to manage well. A mixed holding can also carry a few birds alongside the melons, and our day-old chicks page explains what we sell and how the first weeks go. You can order from the homepage or call the hatchery on +233 24 915 1503.
Questions farmers ask
How long does watermelon take to grow in Ghana?
Most varieties reach harvest roughly 70 to 90 days after sowing, depending on the variety, the season and the water supply. Flowering usually starts about five to six weeks after sowing, and the fruit then needs one to two weeks to set before it fills. The packet days to maturity are the best starting point, and your extension officer can tell you how the variety performs in your area.
Why are my watermelon flowers falling off without fruit?
Male flowers normally drop after a day or so, so some of what you see on the ground is expected. A female flower that falls without setting usually means it was not pollinated, often because bees were scarce, sprays were applied at flowering, or the weather was too cold or wet for them to fly. Hand pollinate in the early morning and check the field for bees before you spray.
Can I grow watermelon in the rainy season in the south?
It is harder than in the north. Heavy rain during flowering and ripening reduces pollination, splits fruit and encourages rot and fungal disease on the leaves. Some growers do it on raised mounds with good drainage and careful spraying, but most plant in the drier windows. Check the local planting calendar with your district MoFA office before deciding.
How can I tell a ripe watermelon without cutting it?
Look for three signs together: the tendril nearest the stalk has dried and browned, the ground spot has turned from white or green to yellow, and the skin has lost its shine. A dull, deeper sound when you tap the fruit helps too, but it takes practice. Cut one test melon from the same field if you are still unsure, and keep notes on how each signal matched the flesh.
Are watermelon rinds safe to feed to chickens?
Rinds are a treat rather than a feed, and they should be offered in small amounts with the rest of the ration. Remove any mould or rotten flesh first, because rotten fruit can carry spoilage and disease. Keep the birds on a balanced ration with the protein and minerals they need, and follow your vet's or extension officer's advice on treats.
Can goats eat watermelon vines after harvest?
Goats will eat spent vines and leaves, and that can be useful as a bulk green when they are fed in moderation. Introduce the material gradually, watch droppings and appetite, and keep the vines away from the main feed bins. Feed should be balanced for your animals, so check the rest of the ration with your vet or extension officer before you rely on crop residues.
Which regions of Ghana suit watermelon best?
The northern savanna is a traditional watermelon area because of its long rainy season and warm days, and irrigated plots in the south and middle belt can also produce a crop in the dry season. The right window depends on water, soil and the variety you choose. Ask your district MoFA office and the nearest research station which sites have performed well recently.
