Growing roses from onions is not a scientifically proven or reliable method for propagating roses. Roses are typically propagated from cuttings, grafting, or seeds, and onions are not related to roses in a way that would allow them to be used as a viable propagation method.

If you are interested in growing roses, it’s recommended to use established and reliable methods such as:

1. Growing Roses from Cuttings:

  • Select a healthy stem from an existing rose plant.
  • Cut a 6-8 inch (15-20 cm) section at a 45-degree angle just below a leaf node.
  • Remove any flowers, buds, or leaves from the lower half of the cutting.
  • Dip the cut end in rooting hormone (optional but can improve success rates).
  • Plant the cutting in a pot with well-draining soil.
  • Keep the soil consistently moist, and place the pot in a shaded area until roots develop.
  • Once roots are established, transplant the cutting into a larger pot or the garden.

2. Growing Roses from Seeds:

  • Collect seeds from rose hips (the fruit of a rose plant) or purchase rose seeds.
  • Soak the seeds in water for 24 hours before planting.
  • Plant the seeds in a seed tray or individual pots with a well-draining potting mix.
  • Keep the soil consistently moist and place the tray in a warm location.
  • Once the seedlings have developed true leaves, transplant them into larger pots.
  • When the seedlings are strong enough, transplant them into the garden.

3. Growing Roses from Grafted Plants:

  • Purchase grafted rose plants from a nursery. Grafted roses are a combination of a desirable rose variety (the scion) grafted onto a hardy rootstock.
  • Plant the grafted rose in well-draining soil in a sunny location.
  • Water the plant regularly, and fertilize as needed.

Using onions to grow roses is not a reliable method and may not produce the desired results. Stick to proven methods like cuttings, seeds, or grafted plants to ensure successful rose propagation. If you are interested in experimenting with different methods, that’s great, but be aware that not all experimental methods will yield positive results.