What are rainbow rose seeds?
Then, do rainbow rose seeds work?
As they are unnaturally coloured, they don't last as long in a vase as regular roses, as the dye affects the plants' ability to photosynthesise and survive. You cannot grow rainbow roses naturally from bulbs are seeds, despite seller claims on eBay.
Also Know, can you really grow rainbow roses?
Unfortunately, rainbow roses need to be created, not grown. As mentioned, rainbow roses are not the result of crossing two different colored roses, and even if they were, hybrid plants do not grow true to seed until they have been stabilized. However, you can try and color some roses yourself.
Rose seed germination may take anywhere from a few weeks to a few years, depending on the species. Once you see the seedling appear, however, roses can grow quite quickly. Beware that while most species roses come true from seed, cultivars and hybrids do not and are usually propagated vegetatively.