Start fertilizing as soon as you have flower development. The mango fruit needs nitrogen and potassium. The fish emulsion doesn't have enough potassium and the liquid kelp is just garbage. The cow manure has very little benefits with less than 1-1-1. Your soil must be full of nutrients if you are using this stuff. It is a waste of money.

Mango trees are strong grower. I never heard of micronutrients deficiency. They just need nitrogen, phosphorus, and potassium. If your mango is not established and still small and growing, then after the harvast and before the Fall you would give it a little phosphorus.

Hi Tony D, thank you for your response. My trees look healthy and I have no current issues with them. The trees are all in ground. I asked this question because as a native south Floridian, as kid we only gave are mango trees a balance fertilizer 2 times a year and gave them phosphorus and potash once around October. We certainly did not fertilize the trees every month. I felt that I was possibly over doing it with this every month fertilizer schedule. Yes, you're right about the soil it has been given a lot of organic material and appear very rich. Once again thank you Tony, I'm going to just keep it simple from now on.

I stay north of the Redlands. The tropical weather is the best. Some people water and fertilize year round and wonder why their mango tree never bloom. There can be no new growth during the fall and winter for flower to bloom in spring. They can sometimes bloom with new growth in the fall but not winter.

They have huge trees with a bunch of leaves and no flower. They eventually start asking questions.

The easier thing to grow in my area is bananas. A lot of people grow bananas. We planted two banana trees in two different spots and get a crop of bananas every two months. We don't even fertilize. We just water them a little.

Everything I grow has to be less than what I pay for them at the supermarket.

Most of our neighbors are farmers. When one neighbor fruits doesn't grow, we tell them what they need to do. One of my neighbor made $40K taking his Longans to market. The other neighbor made $120K with dragon fruits. They quarantine our area due to Asian fruit flies, but my neighbor snuck a load of dragon fruits pass the agricultural police.

I am trying to find the most profitable and lowest maintenance fruit that I can grow in my area. Mangos are too cheap and just about everyone has one in there yard. People are giving it to their friends and families. Not too many people are buying it.

The region I'm in is a major exporter of Mangos, and internationally to places like Europe, China, Malaysia and Singapore. Many individual Mango plantations here run from 10's of thousands of trees to 100's of thousands of trees, so their fertiliser programs need to be effective and economical. Fruit has to be top quality and production cost effective. I got out of the business (was only part time anyway) because I wasn't prepared to expand up to large scale. So I've been getting rid of trees but still have over 500, a tiny fraction of what some others have here.

Soil tests showed my place needed zinc and boron, not unusual in the tropics. I was using organic foliar sprays but they're usually pretty weak. Now I don't use any fertilisers except occasionally on a few trees that I want to keep.

It's the timing of rainfall that's important for Mangos, but winter isn't a good time. That's when they normally flower. When necessary, the ideal water input is from ground level sprinklers to keep water off the upper parts of the trees. Rain when fruit is developing can cause it to split. And rain also promotes anthracnose.

Never put Nitrogen on a Mango tree for production it just grows wood. All you need is 0-0-50 and miner minerals on a producing mango tree. Rain will give it all the nitrogen that it needs and your fruit will taste better. I own a grove. On young tree the fertilizer is different then on a production tree and you can taste and smell the difference. Good luck.

California Bay Area Mangoes operate way different. I fertilize whenever I see a flush and I also like to help it ..right about now with its small developing fruit with an acid type fertilizer and I can't say that's the best but it does green them up in our cooler summers. I would never fertilize them in our cool spring weather even if flowering, or past early September.

to Tony Doe: sorry to hear what you are saying about seaweed, actually that is pure ignorance in your part, actually micronutrients are very important for mangos trees, you will be best served by educating yourself, there have many studies proving the contrary on your uneducated opinion. Micronutrients play very major role in the life of fruit trees as well as other plants. there were many studies by the scientific communities to assert the benefits of like 70 micronutrients that seaweed extract from the sea. Education is very important, don't speak without knowledge, makes you sound very ignorant.