Plant the miniature roses in 6-inch pots. Use a peat-based potting soil containing perlite and vermiculite.
Set the pots in a tray of water and pebbles. Keep the miniature roses in a sunny location. Put them in direct sunlight for five hours daily.
Pour water on the miniature roses when the soil is dry to the touch.
Fertilize the miniature roses every two weeks with a water-soluble fertilizer.
Cut off faded, wilted flowers with pruners to encourage fresh growth.
Bathe miniature roses under running water once a week to prevent pests.
Examine the miniature roses for symptoms of spider mites such as lightening in the lower foliage and discolored leaves. Shake the leaves above a piece of white paper. Check the paper for small dots.
Mix 1 tablespoon soap and 1 quart water in a spray bottle. Spray the soapy solution on the miniature roses three to four times a week to control spider mites. Rinse the miniature roses with warm water.
Spray whiteflies, which are white-colored insects, with a lightweight horticultural oil once a week.
Spray aphids, which are green insects, with water.