Starting the rose seeds
Before growing the roses from seed, the seeds have to undergo a period of stratification. This is a cold moist storage that gets the seeds ready for germination.
Cold Treatment
Chilling your seeds in a refrigerator for about six to ten weeks encourages them to germinate faster once planted. However, you must take care to avoid keeping them cold for long as they can germinate while still in the refrigerator. Place your seeds on a paper towel before moistening them. Use half purified water and half peroxide to prevent the growth of mould. You can then place them in a plastic zippered bag, mark the date and variety before placing in a refrigerator set at 1 to 3 degrees C. The paper towel should remain moist for the entire period. You can check occasionally to see if it needs remoistening. Make sure you don’t freeze the towel.
There are other ways to stratify the seeds like planting them in a tray of potting mix and refrigerating the entire tray for weeks. The tray is usually enclosed in a plastic bag to keep it moist.
Planting your seeds
When you think your seeds are ready for planting (6-10 weeks), remove the bag from the refrigerator if that was your stratification method. You will need shallow trays or small pots to plant your seeds. Whatever works between the trays and pots is fine as long they have good drainage. The ideal size of the trays or pots should be 3-4 inches deep.
You can use separate trays when planting seeds from different varieties of rose hips. You must follow your labeling all the way down from harvesting, treatment, and planting. The rose bush name and planting date are some of the details to indicate on your trays or pots.