Also, be sure and sterilize the containers you are using. If you re-use pots or flats you should wash and then dip in a mixture of one part bleach to 10 parts water. Larkspur germinates best when chilled to 35 degrees F for about seven days after sowing. It will take about 10-20 days to germinate after that but should be kept between 55 and 60 degrees. Last, I suggest you contact your local Extension Office.
Tulips require well drained soil and good sunlight.
If you just bought plants that are in bloom in a pot, I suggest you put them outside in a partly shaded area for about 7-10 days. Then plant them in their permanent home after adding plenty of compost or peat moss to the soil and mixing it well. The plants may not bloom next year but hopefully will the following year. They are generally not long-lived bulbs however. Dear Tom, I planted tulip and crocus bulbs last fall around my townhouse deck.