Even the ones that come from grocery stores will grow well in the ground if you take a few precautions. They're planted in some sort of moisture-retaining medium to keep them looking good in the stores, but if you shake off as much of that medium as possible before planting you should have no problem. Cindi's right about separating them if there are several in the pot. And avoid applying any fertilizer to those for a long time after planting. They're pumped full of fertilizer to appeal to customers. Applying any more would be overkill.