So you fell in love with a miniature rose at a florist or grocery chain. Now what do you do with it? Despite their fragile appearance, these tiny rose plants are hardy, outdoor ornamentals that can take lower winter temperatures than many larger roses. They can remain inside as a houseplant for a short time, until you are ready to transplant them.
From The House To The Garden
Place your rose in your home's sunniest spot. Fill a bowl with water and set it next to the pot to provide humidity. Water when the top of the soil feels dry to the touch, but never let the roots dry out completely.
Repot your rose in a pot approximately 1 larger than its current one, if you cannot transplant the rose outside for more than a few weeks. Use a fibrous potting mix with some added compost or peat moss. Like all roses, miniatures thrive in a moisture-holding acidic soil.
Harden off your rose by placing it outside for a few hours during the middle of the day. Do this for a week to help the rose transition to outdoor temperatures. Transplant your miniature rose outside after the final spring frost date, when daytime temperatures are at least 50 degrees F.
Dig a hole 12 inches wider and deeper than the rose's pot, then mix the soil with compost or peat moss and bone meal. Plant your rose in a spot that receives at least six hours of full sun. It should have a spacing of 12 to 15 inches on all sides, to give it room to spread. Place the rose at the same soil level as it had in its pot, with the crown just above the soil line. Backfill the hole, tamping the ground firmly around the roots to get rid of air bubbles. Water well.
Fertilize four weeks later with the recommended amount of rose fertilizer, and continue fertilizing through the growing season. Water at least once a week until the top 2 inches of soil are thoroughly soaked.