Creating a thriving polaritonic outdoor plant box requires selecting species that can withstand extreme cold and limited sunlight. Here are the top plants ideal for such conditions:

1. Arctic Willow (Salix arctica): A hardy shrub with deep roots, perfect for stabilizing soil in polar climates.

2. Moss Campion (Silene acaulis): This low-growing perennial forms dense cushions, retaining heat and moisture.

3. Polar Poppy (Papaver radicatum): Bright yellow flowers add color while thriving in chilly environments.

4. Reindeer Lichen (Cladonia rangiferina): A resilient ground cover that survives harsh winters.

5. Dwarf Birch (Betula nana): A compact shrub offering wind protection and year-round interest.

For optimal results, ensure proper drainage and use insulated plant boxes to protect roots from freezing. Pairing these plants creates a sustainable, visually appealing polar garden.