Kaho Watermelon

10 Seeds

Kaho is a traditional open-pollinated watermelon variety associated with Japan and originally introduced there from China in the early 20th century. It produces relatively small, elongated fruits, typically around 0.9–1.8 kg, with a thin rind and attractive salmon-orange flesh. The fruit is sweet, crisp and suitable for fresh eating.

Kaho is also noted for its comparatively compact vines and smaller fruit size, making it more practical than many large watermelon varieties for home gardens and large containers. Under suitable conditions, it can mature in roughly 70–85 days, depending on whether the timing is measured from sowing or transplanting.

🌱 Best Planting Time

• Gulf region: February–April and September–October
• Kuwait: March–April and September–October
• Best Kuwait periods: March–April for spring production and September–October for an autumn crop.
• Plant when the soil is warm and nighttime temperatures are reliably mild.
• Avoid sowing during the coldest winter period or during the most extreme summer heat.

Watermelon is a warm-season crop and performs best when soil temperatures are at least around 21°C.

🌿 How to Plant the Seeds

1. Choose a location receiving full sun with excellent drainage.
2. Prepare loose, fertile soil and incorporate mature compost.
3. Make a small planting hole or mound.
4. Sow 2–3 seeds about 2–2.5 cm deep.
5. Cover lightly with soil and water gently.
6. Keep the soil consistently moist until seedlings emerge.
7. After germination, keep the strongest seedling and remove the weaker ones.
8. Allow approximately 90–120 cm between plants for Kaho, with additional room between rows where space permits.
9. Mulch around the plants once the soil is warm to help conserve moisture and reduce weed competition.

Kaho-specific growing information recommends sowing around 2.5 cm deep and spacing plants roughly 90–120 cm apart, while general watermelon production often uses wider spacing depending on vine growth and available land.

🌡️ Germination

• Suitable temperature: approximately 21–30°C
• Ideal warm range: around 21–35°C soil temperature
• Germination: commonly about 5–10 days under favorable conditions.
• Keep the seedbed moist but never waterlogged.
• Provide strong light immediately after emergence.

Kaho is reported to sprout in approximately 5–10 days, while general watermelon guidance gives a broader emergence period depending on temperature and conditions.

🌱 Transplanting

Kaho can be started in individual containers and transplanted while young.

• Start seeds in individual pots rather than crowded trays.
• Transplant when seedlings are well established and have several true leaves.
• Handle the root ball carefully.
• Avoid disturbing the roots unnecessarily.
• Harden seedlings gradually before moving them into strong outdoor sunlight.

Because watermelon roots dislike unnecessary disturbance, direct sowing is often the simplest method when outdoor soil is already warm.

☀️ Sunlight

• Provide full sun.
• Aim for at least 6–8 hours of direct sunlight daily.
• Strong sunlight is important for vigorous vines and sweet fruit.
• In the Gulf, protect very young seedlings from exceptionally intense afternoon heat.
• Good airflow around the vines helps reduce fungal problems.

Kaho is specifically recommended for full-sun growing.

💧 Watering

• Keep the soil evenly moist during germination and early vine growth.
• Water deeply rather than giving frequent shallow watering.
• Increase attention to irrigation during flowering and fruit enlargement.
• Avoid letting the soil remain continuously saturated.
• As fruits approach maturity, slightly reduce excessive irrigation rather than keeping the soil constantly wet.
• Mulching can help maintain more stable soil moisture and temperature.

Kaho's growing guidance recommends deep, consistent watering and reducing watering somewhat as the fruit begins to ripen.

🌱 Soil

Use:

• Loose, fertile, well-draining soil
• Sandy loam or another light-textured soil
• Mature compost or well-decomposed organic matter
• Perlite, pumice or coarse material for containers where necessary

Watermelon performs particularly well in well-drained soils with good moisture-holding capacity. Avoid heavy, poorly drained soil where water remains around the roots.

🌿 Fertilizing

• Mix mature compost into the planting area before sowing.
• Use a balanced fertilizer during early plant growth.
• Once the vines begin actively running, provide additional balanced nutrition if needed.
• Avoid excessive nitrogen, especially once flowering begins.
• Maintain adequate potassium and balanced nutrition during fruit development.

🌸 Flowering & Fruit Development

Kaho produces separate male and female flowers on the same plant. Successful fruit development requires pollination, normally by bees and other pollinating insects.

The fruits are characteristically:

• Small to medium-sized
• Elongated
• Thin-rinded
• Salmon-orange inside
• Sweet and crisp
• Generally around 0.9–1.8 kg according to one Kaho seed source.

Kaho is considered an early watermelon, with maturity commonly around 70–85 days, depending on growing conditions and how maturity is calculated.

🍉 Harvesting

Watch the fruit and plant carefully as maturity approaches.

Signs that the watermelon is approaching harvest include:

• The fruit reaches its expected mature size.
• The area touching the ground becomes more yellowish.
• The tendril closest to the fruit begins to dry.
• The rind becomes less glossy.
• The fruit develops its characteristic mature appearance.

Avoid relying on only one indicator; combine several signs to judge ripeness.

🪴 Growing Kaho Watermelon in Containers

Kaho's relatively small fruits and compact growth make it one of the more practical watermelon varieties for container growing.

• Use a large container, preferably 40–60 L or more per plant.
• Ensure excellent drainage.
• Provide full sun.
• Allow the vines to trail over the edge or train them on a strong support.
• If growing vertically, support developing fruits so their weight does not damage the vines.
• Monitor container moisture carefully because pots dry out quickly in Gulf heat.

🐝 Pollination

Good pollination is important for fruit formation.

• Encourage bees and other pollinators around flowering plants.
• Avoid spraying insecticides when flowers are actively open.
• If pollinating insects are scarce, hand-pollination can be used by transferring pollen from a freshly opened male flower to a female flower.

🔥 Gulf Climate Tips

• Kaho is well suited to warm growing conditions, but Gulf summer temperatures can become excessive.
• In Kuwait, aim for March–April or September–October planting rather than the peak of summer.
• Protect young seedlings from extreme afternoon heat.
• Use mulch to help moderate soil temperature and conserve moisture.
• Provide excellent drainage; standing water can cause root problems.
• During flowering, avoid severe water stress because it can interfere with fruit development.
• Give vines plenty of room and good airflow.
• Container plants may need watering more frequently than plants growing in the ground.
• If autumn-planted vines encounter rapidly increasing winter temperatures or shortening days, fruit development may be less predictable.

🌱 Growing Tip: For Kuwait and the Gulf, start Kaho Watermelon when the soil is warm—ideally around March–April or September–October. Give the young plants strong morning-to-midday sunlight, reliable deep watering and excellent drainage, then reduce excessive irrigation as the fruits approach maturity to help maintain good sweetness.