Question
i just bought 30 thuja occidentalis need some advise how to plant/fertilize/and maintain these evergreen trees?     thanks sue.....

Answer
Dig the holes twice the size of the root ball and as deep and fill with good top soil or potting soil. Mulch around the trees with not more than 3 inches deep of organic mulch and water every third day for a month. Do not fertilize them for a year.
Next year (spring) fertilize them with 10-10-10 fertilizer at the rate of about a hand full per tree scattered around the tree and water in good. They take very little maintenance so just let them grow.