Recommendations are for 30 cm apart for hedging or 3 to 4 per meter.
Plant in moist, well draining soil with plenty of organic material.
Plant the shrubs at the same height that they were in their pots.
Use mulch to help with moisture retention.
Water every day for the first 2 to 3 weeks, then back off to every 2 or 3 days.
A balanced fertilizer can be applied. Follow the directions given by the grower and on the packaging of the product.
Distance form wall can vary--use the 'look and see' method.
Keep in mind that the shrub is very rapid growing.