The best time to plant Rudraksha tree is between September to October

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Few tips:-

For India we need to plant this tree in a shadow to avoid direct Sun during summer,unless the max temp remains below 35*C in your area you cannot grown this tree in open hence got to plant it below other trees.

Water well,keep a slight slope so water does not stay for long in the area,water twice a day in summer,once a day in other season,need not to water in rainy days.

Rest all other tips you can see in below picture.