Longan is an important economic fruit of Thailand could grow all the country and induce on off season of flowering on the year, especially in the northern part of Thailand that has been cultivated for more than produce good quality longan yield and need to be good managed. Longan productions continuously throughout the year, result phonological stage in disorder symptoms of longan. The peel skin is red and hard, causing it to not develop into a large fruit. The aim of this study to solve the problem in disorder syndromes of longan peels skin. The experimental was completely randomized design (CRD). There were 7 treatments; control (1), 0.1, 0.2 % B (2, 3), 0.1, 0.2% Zn (4, 5), 0.1 % B + 0.1% Zn (6), 0.2% B + 0.2% Zn (7) and 5 replications. After foliar application, it was found that in the first month, control had more fruit set per bunch than another treatment (40.80 fruit) was significantly difference. Fruit quality was found that the foliar application zinc and boron had fresh and fruit weight per bunch more than another treatment was significantly difference. Whereas, the width and length of fruit, total soluble solid, peel weight, seed weight did not significant difference. However, skin color showed that boron and zinc foliar application to be clearly green and bright yellow when the harvesting stage had significantly difference. The application of B and Zn foliar sprays had more than standard values of longan leaves. It was shown that the B and Zn foliar application can be leaves absorb and acuminated to use in the enough on growth stage