[header] How to grow moss rose [title] Sow the seeds after the last frost happens in your area. [step] Moss rose seeds can be sown directly into your garden after the final frost in your region. The last frost occurs in spring, often in march or april, although the timing varies depending on your region. 
Search online for information on your growing zone to figure out when sowing moss rose seeds is safe in your area. [substeps] If your area doesn't experience frost, you can sow your seeds around march.