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, Garden Party does not require any special conditions to germinate. 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.