Rosa multiflora nana perpetua. Garden Party is a delightful little mini rose that is easy to grow from seed. It’s a tiny mini rose that is suitable for containers, edging, bedding, and rockeries. Perennial roses that bloom over a long period in shades of pink, rose, and white. While most roses are fussy to grow from seed, with unpredictable results, in our experience Garden Party does not require any special conditions to germinate. Speed and evenness of germination may be improved with vernalization. That’s planting the seeds in moist soil, and then refrigerating the planted pot for two to three weeks. This simulates a winter chill, and tends to produce the best results. Sow the seeds between January and March, and you’ll even get flowers the first year! We are pleased to offer these unusual Garden Party rose seeds for the first time in Canada.