Soil is the number one key secret to an abundant harvest of bananas. It has to be planted in rich and well drained soil with a pH level of 5.5 or 6.5, which are both acidic.
Bananas need plenty of water. Since it grows in warm, humid weather, the soil quickly gets dry that’s why deep watering is a necessity. Do not just make it a regular habit to water the trees but also make sure every amount goes as deeply as it can. Be sure that you do not overwater as this can result to the decay of roots.
Tip: Use an expandable hose to water bananas.
Fertilizing bananas is an intensive and vital part of the growing process. This is most applied during the warmest temperature of the year. Experts suggest the use and application of a balanced fertilizer even just once in a month. There are absolutely several selections of fertilizers for banana trees but choose only one that is best for your banana variety.
On average, the most recommended fertilizer has the ratio of 8:10:8 NPK (nitrogen-phosphorus-potassium). Once it has become mature, you may apply 1.5 or 2 pounds of this formula of fertilizer and only 1/3 of that amount for baby or young plants. Evenly spread the fertilizer to cover the nutrients needed but do not apply anywhere in the trunk.
Basically, banana trees need nitrogen, phosphorus and potassium or otherwise known as NPK for fertilization. The higher the number is the more concentrated the nutrients are. You may test at first until you get the right formula depending on the plants need. In usual cases, nitrogen should be higher but if this seems inefficient, you can increase the amount of either potassium or phosphorus.
You must know that bananas are considered heavy feeders meaning they need regular fertilization to become productive. This can be mixed with water or applied once the water has dried out to half an inch.
There’s also what is called the multi-K fertilizer. This is one of the improved fertilizers for banana trees since it has more advantages than regular ones. The average rate of each nutrient which is 400 to 600 nitrogen, 200 to 300 phosphorus and 850 to 1100 potassium must be observed.
Furthermore, nitrogen should be divided into different dressings, normally with the interval of 1 to 3 months or 2 to 4 weeks depending on the weather and temperature. You may also use potassium nitrate since it has both nitrogen and potassium but this has to be a ratio of 1:3.
For phosphorus, it is not that much but still a required nutrient for banana to grow. On the other hand, potassium is as important as nitrogen. The lack of enough potassium can lead to the reduction of production of fruits and even growth. An indication of deficiency of this nutrient is when the leaves have orange and yellow chlorosis and ultimately die if not maintained immediately. There is also delay in the blooming of flowers and development of fruits.