It is most suitable to plant open-air watermelons from mid-March to early April. When planting, you can choose large-fruited varieties with strong stress resistance, high yield, and high quality. It is best to choose a loose and well-ventilated plot for planting. When the surface temperature of the soil is stable at around 15°C, it is the best planting period for watermelon seedlings. Watermelons in the open field do not need to be watered frequently during the seedling growth period. Wait until the soil becomes drier before watering.

The most suitable temperature for growing watermelons in the open air is 25-30 degrees Celsius. For watermelons in the seedling stage, the temperature should not be lower than 15 degrees Celsius. Therefore, it is best to choose the Grain Rain solar term when planting, because from the temperature characteristics, the temperature during Grain Rain can reach above 16 degrees Celsius, which meets the growth requirements of open-air watermelons.

Open-air watermelon planting time

Open-air watermelon planting is most suitable from mid-March to early April. At this time, the temperature has risen, and watermelon seeds are not susceptible to freezing. The rainfall is relatively abundant and the air humidity is relatively suitable. This can greatly improve the germination and survival rates of watermelon seeds, and the seedlings during the nursery period are not easy to dry out.

Open-air watermelon planting technology

1. Select varieties

Before planting open-field watermelons, you must carefully select varieties because they are on the market late. Therefore, instead of choosing early-maturing varieties with lower yields, choose large-fruited varieties with strong stress resistance, high yield, and high quality.

2. Land selection and preparation

It is best to choose loose and well-ventilated plots for planting watermelons in the open field. Remember that continuous cropping is not allowed and must be done once every 5-6 years at most. Rotate crops, otherwise it will affect its growth.

3. Planting temperature

When the surface temperature of the soil is stable at around 15°C, it is the best planting period for watermelon seedlings. Failure to reach this temperature will cause adverse effects on the watermelon. good influence.

4. Watering management

Watermelons in the open field do not need to be watered frequently during the seedling growth period. Wait until the soil becomes relatively dry before watering, and keep the soil slightly moist.

Open-field watermelon management methods

1. Fertilizer and water management

Open-field watermelon has a great demand for fertilizer during the seedling stage. At this time, we can pile some fertilizer on the surface of the soil. Remove layers of dead leaves and spray potassium dihydrogen phosphate solution 2 to 3 times on the leaves.

2. Weeding

For open-field watermelons, manual weeding must be carried out 2 to 3 times before the watermelon vines extend out of the ridges. When the watermelon vines extend out of the ridges, weeding must be carried out in time. Pull weeds from the fields.

3. Prune and press vines

When planting watermelon in the open field, remember to save its main and side vines, and then keep 10 leaves of the watermelon and pinch the tips. If the side vines are Branches and buds should be cut off as soon as they sprout.

4. Select melons

Each watermelon plant in the open field must determine a standard melon, so that watermelons can harvest standard fruits. If you do not choose melons or set melons, the commercial rate of watermelons will be inevitable. reduce.