I don't like your soil conditions. Its clayee.....should add something to make it drain better. It has a tough crust..seems to be like that since long. Plants need to breathe more.....fungus on top crust, again sign of frequent watering..poor drainage, poor media and lack of hoeing. I agree that in summers we need not to hoe very often but considering your soil conditions i recommend to do that atleast with a interval of a week.Hamad Ahmed Kisana wrote:i sowed 10 seeds of amranthus on 18-06-13 for experiment...6 in situ and 4 in pot. luckily they all sprouted. recent situation is this that 3 in situ died due to rains and 1 died in pot ..others are growing well..
plants in ground..
in pot..
.
plants in ground are lanky and unhealthy but pot plants are healthy.
Don't mind if i am being tough(apno kay saath hi tough hota hai insaaan

This is the very reason your datura died. Clay and fungus.