Q: I have a pumpkin plant in my garden that produced two to three baby pumpkins – roughly ping pong ball size – at a time but after two weeks, the pumpkins turned yellow and dropped off. This has happened a few times. Why is this happening and what can I do about it? – Tan Hon Yin-A: Over-watering (as well as under-watering) your trees can cause fruit drops. You should only water it when the top soil is dry. Too much water can drown the roots and cause root rot and no fruit to form.Another possible reason is your fertilisation. Fertilise less with nitrogen and more with potassium and phosphorus. You can even include calcium in your fertilisation programme.-Find out more in our Ready, Set, Grow! column in Star 2 - The Star [link in bio!]-If you have any gardening questions, send your queries to* All questions are answered by Dr Christopher Teh, soil biologist and senior lecturer at Universiti Putra Malaysia #eatsshootsandroots #DearPlantDoctor #ReadySetGrowESR #TheStar #garden