March is traditionally bulb planting time but most garden centres have a selection of bulbs available now, or you can buy from specialist bulb growers such as NZ Bulbs. Buy your tulip, anemone and ranunculus bulbs and pop them in the fridge for 6-8 weeks before planting. Tulips, especially if you live in a warm area, need a period of chilling to initiate bud formation, and anemones and ranunculi will have a better germination rate if chilled first too. Place them in paper bags in your fridge and keep them away from fruit. Many fruits emit ethylene, which can cause the bud inside the bulb to abort.
This gorgeous photo comes from here.