How much do conifers grow respectively year? are there any distinctive types that grow faster? what would cause a conifer...

are there any distinctive types that grow faster?
what would cause a conifer to die rotten when all others close by are fine?
Answers:    There are different conifers and they all own different rates of growth, the fastest that is available is Lawson's Cypress, which will grow one foot and and more respectively year, the dead conifer be probably diseased and these thing do develop, dig it out and own a look at the roots so see if there is any sign's if insect infestation, replace the soil near fresh soil from another part of the garden formerly you replant a replacement.