Answer:
study agriculture and types of agricultural skills and equipments, and most importantly the seasons. make sure she has the right equipments, soil, and the type of mango seeds to increase her success in germinating and growing mature plants. Or she needs fertilizers, humus and compost, a different type of mango seed or seedling maybe and make sure she waters them regularly and transplant it if necessary to increase fertility and growth and avoid malnourished and infertile. it's my opinion.
