Ireland and have even been considered a symbol of good luck. They are popular houseplants and fun gifts for friends and neighbors on St. Patrick’s Day. Shamrocks are easy to grow indoors if you follow these simple and easy to remember steps:
Light
Shamrocks prefer bright, indirect sunlight, be sure to place your plant in a window where it will receive plenty of light. Shamrocks will flower, even during winter, if they receive enough light. Each night the plant's leaflets fold up, then reopen in sunlight the following day.
Food
Shamrocks like food! Fertilize them regularly with either a liquid houseplant or a time-release fertilizer during their growing season. As always, we recommend following label instructions.
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| Iron Cross Shamrock |
As a houseplant, they prefer moist soil.
Avoid allowing your shamrock to dry out during the growing season.
Temperature
Give your shamrock a growing temperature between 50 and 70 °F during the growing season. They can be placed outside after danger of frost has passed and are a beautiful addition to your pots or in a grouping of pots.
Dormancy
Shamrocks have a dormant period. When your shamrock goes dormant, usually in late summer, don’t fret! Just place it in a cool, dry location out of direct sunlight for 2-3 months. The purple-leaf types only need one month of dormancy. 
Since your shamrock grows from small bulbs, it is easy to divide and create new plants. Here's a short video showing how to propagate shamrocks.
Happy St. Paddy's Day to you!