Thus far I have grafted Lemon Zest onto two seedling tree, one manila and one Kent. Both are doing well and are quite vigorous. I will likely have to spray the LZ with Sulfer or Copper at least several times a year to prevent powdery mildew but in my view, it is worth it for the quality of the fruit.
In 2018 my most vigorous grower was my Coconut Cream grafted on manila root-stock. Now in late October, it is starting its 3rd flush. (See attached photo)
My sweet Tart Mango tree, also on manila root-stock, grew well in 2018 but only put out one major growth flush in July so far. Perhaps it will do another in November as sometimes happens as it did in 2017 but every growing season is different. (See 2nd Photo)
My Nam doc Mai on Manila has also done well this year. Unlike Sweet Tart is has a number of smaller flushes throughout the year on a continuous basis but the flushes only affect a limited number of branches. Right now just like the CC some limbs are flushing but more so on the CC. (See 3rd photo)
Because I focus on the growth of my young mango trees I remove all fruit in late spring or early summer and will do so again in 2019. In 2020 I will let all of my mature trees go into maximum production.
As a side note, the CC and Sweet tart were grafted in the summer of 2016 and the Nam Doc Mai was grafted in 2015. All of the trees were planted in the ground in 2016.
Johnny