Prepare the planting area, adding organic compost and phosphate-heavy fertilizer to encourage blooms.
Dig daffodil bulbs from growing area in autumn, several weeks before the ground freezes. Dig several inches from the foliage, as baby bulblets may grow from the main bulb. Replant small bulblets for blooms to occur in two to three years.
Plant a portion of the bulbs into the newly prepared bed. Replant some of the bulbs back into the area where originally planted, if desired. Add the high phosphorous fertilizer if you have not already done so.
Position the bulbs in the soil with the tip pointing upward. Plant them three times as deep as their height.
Water plants well.
Dig clumps of phlox paniculata in early spring when growth appears. Plant these into the same bed with the daffodils or into a separate, prepared area, as desired. Dig enough clumps to leave 12 to 18 inches between plants. Divide large clumps with the shovel, splitting through the middle.
Prune any dead or damaged roots. Trim root tips to encourage vigorous growth of this plant.
Water newly planted clumps.
Cover both daffodils and phlox with organic mulch. Mulch offers protection from the cold during extreme winters and helps retain moisture in summer. Organic mulch breaks down over time, supplying some nutrients to bulbs and flowers.