For more info see Soil Smarts . Regardless of the condition of your soil it can never hurt to add extra organic material - compost, peat moss or manure to your garden each year at the beginning of the growing season. Mix in a little inorganic fertilizer as well. Organic matter works like a sponge, improving the soil's ability to retain most nutrients and water. Inorganic fertilizer completes the balance of nutrients a soil needs to be considered good soil.
Good soil makes a good foundation for good plants.
Make sure they have been acclimatized to the outdoor world for at least a week. This means hardening off the plant little by little from its' protected greenhouse environment allowing it to develop a hardiness to the elements of the great outdoors. If you don't harden them off, the shock of the climate change could kill them. Loosen the rootball before planting Consider the spacing between the plants to ensure your bed will be able to accommodate more plants in the next year since many will expand in the spring. Planting in the full heat of a sunny summer day is risky.