Ketchup & Mustard Rose ~ 20 Seeds ~ Rare Rose seed germination tips: Rose seeds need cold temperatures to initiate the germination process, so place the seeds in a plastic bag in the veggie crisper drawer of your fridge for about 60 days. Mark your calendar so you know when its time to take them out Size: 3-4 Feet Tall, 3 Feet Wide Hardiness Zones: 3-11 Due to varying conditions regarding germination like moisture and temperature or soil contamination also buyers experience and knowledge of seed germination with these factors I cannot guarantee germination rates. I do guarantee all seeds are fresh and germination tested to make sure seeds are good and viable.