When my Mallikas start to show some yellow, I start testing them on the tree. Lift the mango slightly bending the stem. If it is ready, it will pop off in your hand. With Mallika, they will probably need a few more days in a warm spot after that. If you eat them before they turn completely yellow, when they still have a hint of green, you should get a flavor that is a mix of melon and tangerine sherbet. Most of the ones I've tried from anywhere but my own tree have been a bit too ripe. They are still good, but they lose that tangerine sherbet quality that I really like. Despite previous claims that you can pick them green and let them ripen for weeks, I've found if picked too soon, they have a bit of a vegetable taste when ripened.