How to grow cashew nuts? Time and farming technique

To grow cashew nuts effectively, you need to pay attention to characteristics such as time, technique, water level, humidity, …

Cashew Nuts Growing Information: Time and Technical requirement

1. Cashew planting season

The most suitable time to plant cashew trees is at the beginning of the rainy season, as soon as the soil receives the first rainfall. It will become porous and easy to care. Along with that, cashew trees will have favorable growing conditions throughout the rainy season. In Vietnam, the most suitable planting season is when the rainy season is stable, usually starting from June to August.

2. Density and distance of cashew planting

When planting, special attention should be paid to the density and distance between the cashew trees. In order to have high productivity, cashew trees should be planted thickly initially. Then after the trees disperse, the trees in the middle should be trimmed away.

– The initial distance is 8x6m or 10x5m (equivalent to a density of 200 trees/ha)

– Then thin out the trees in the middle to create a distance of 8×12 or 10x10m (density of 100-120 plants/ha)

3. Technique of digging holes to grow cashew nuts

   

The cashew plants make the most of the light conditions for the development of foliage and the resulting flowering later. Dig a hole in the shape of a box with dimensions of 50x50x50cm or 60x60x60cm. When digging holes, pay attention to the top layer of loose soil and humus to one side of the hole. Then keeping the deep layer of soil separate on the other side of the hole.

4. Farming techniques to grow cashew nuts

Cashew trees need to be planted when the rainfall has stabilized. For gray soil with high clay content and poor drainage, it is necessary to cultivate the soil to fill the base so that water does not stagnate in the planting hole after heavy rains.

To grow cashews, put the pot down next to the hole and then use a sharp knife to cut off about 2-3cm below the bottom of the pot. Next, put the potting down in the center of the hole, make a longitudinal incision of the pot and compact the soil around the base of the tree.

After planting, if there is no rain, it is necessary to water the cashew plants with a small amount of about 20 – 30 liters/hole so that the roots and soil in the pot bond with the soil in the hole and provide enough water for the seedlings.

Light, temperature, humidity, and soil to grow cashew nuts

Cashew tree is a long-term industrial plant with high yield and quality. It is necessary to pay special attention to 4 factors: soil,  light, temperature and humidity.

1. Soil

We can grow cashew trees on many different types of soil. However, cashew trees only give high yields in deep soil layers, light mechanical composition, and good drainage. Soils is sandy clay without a subsoil, with groundwater at a depth of 3-6m. Cashew trees can also grow well in sandy soil, because of its good drainage. Besides, red soil is also suitable for cashew trees to grow and develop.

Types of soil are not suitable such as heavy clay soil, tight squash, hill feralit soil with floating rock layer or loose sandy soil with too deep aquifers. These types of soil only yield very low or even no fruit for cashew trees

2. Light

Cashew trees are suitable for full light and produce fruit at the tips of branches, so plants are grown alone or planted with appropriate density, ensuring an adequate light regime for high yield. During flowering, the plant requires more light. On average, cashew trees need about 2,000 hours of sunshine per year. In mountainous areas, especially in valleys with hidden mountains, fog often appears to reduce light intensity, cashew trees can give poor yield and quality.

3. Temperature

Cashew grows well in tropical climates and is especially sensitive to low temperatures and frost. Cashew has the ability to grow in a relatively wide temperature range (7 – 46 degrees Celsius) but only grows and develops well in the temperature range from 24-28 degrees Celsius. However, if you want to have a high yield of cashew nuts, you should not choose areas with an average annual temperature below 20 degrees Celsius.

4. Humidity

The appropriate rainfall for cashew tree growth is from 1,000-2,000 mm/year. The distribution of precipitation during the year affects flowering and fruiting more than the total amount of precipitation. Cashew flowering season usually lasts about 2 months, at this stage requires very dry weather. Cashew trees are suitable for growing in regions with two distinctly blind climates: rainy season and dry season. During the rainy season, cashew trees grow and accumulate nutrients so that when entering the dry season, they will flower and bear favorable fruits.

 How much water need to grow cashew nuts?

1. Cashew trees are very drought tolerant

Because it is a tropical tree, cashew trees are very drought tolerant. Thanks to the structure of the good root system, the cashew tree has good drought tolerance, when the cashew tree’s roots begin to dig deep into the ground. Cashew tree roots include rat roots and eagle roots. Rat roots dig deep into the ground to find groundwater, vital for tree life.

2. Watering twice a day for small cashew nuts

   

When the cashew tree is young, still from the nursery, and has just been placed in a permanent planting hole. Remember to water the cashew tree twice a day, morning and afternoon.

Watering from the top to the base, watering the surrounding soil, in order to support lush seedlings. Because then, the roots of the tree are not mature yet.

3. Watering in the dry season

At the end of the rainy season, the young cashew tree has taken root, the tree has grown tall and can live on its own. However, in the first months of the dry season, growers still have to continue watering the plants until the seedlings are six or seven months old. This helps to make sure that the cashew tree’s root system is working effectively, absorbing enough water to feed the tree despite the intense heat.

4. Cashew trees need rainfall from 1000 to 2000 mm

Cashew trees suitable for planting land have two distinct rainy and sunny seasons in a year. Moreover, the annual rainfall must also be moderate, averaging from 1000 to 2000mm. Rain is at a minimum, about 500mm on average in the year, the cashew tree can still live. But in the drought season, if there is abundant water available, even once or twice a week, it will make the cashew tree lusher and give a higher yield.

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