Can I Grow Primose Flowers Inside?

Indoor Growing

• Perennial and annuals flowers do well in pots and indoors with the right foundations and placements, though some do better than others. Jennifer Schultz Nelson of the University of Illinois Extension's Plant Palette notes that primroses don't rebloom in indoor situations, and suggests growing them as indoor annuals, for a single season only.

Pot and Potting Soil

• Jennifer Schultz Nelson also notes that primroses tend toward root rot in indoor situations. Use large clay pots with drainage holes to encourage better circulation and drainage, and to restrict the chance of root rot. Purdue University's Department of Horticulture recommends a potting mix of 1 part peat moss to 1 part garden loam and 1 part perlite for a rich, airy and quick-draining foundation. Loose foundations encourage better root health.

Site

• Primroses hail from deciduous forests and require cool temperatures and partial shade. Put them in indoor sites with good air movement and indirect sunlight or morning sun and afternoon shade. Don't keep the primroses near heating vents, which expel hot, dry air. Do keep them near open windows for air movement.

Maintenance

• Primroses require consistent moisture but fail in muddy soil. Monitor the soil for moisture and give the plants 2 inches of water when the top of the soil dries. Purdue University's Department of Horticulture recommends 5-10-5 fertilizer every six weeks for flowering annuals. Use water-soluble fertilizer, per manufacturer directions, for easier pot applications. Use horticultural oil for safe indoor pest control.