I Have Something Griwing At The Bottom Of My Standard Rose

Question

This is the 2nd year of me having this standard rose, it has always been in this pot along with cyclamen and snow drops

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Answer 1

It looks like there has been some type of wound there and it is forming a callus and possibly adventitious roots. It may be stressed by the competition for water and nutrients with the other plants. It doesn't really look like galls or cankers. Here is more:

https://www.public.asu.edu/~camartin/plants/Plant%20html%20files/Rose%20Problems.pdf

https://www.gardeningknowhow.com/ornamental/flowers/roses/container-roses-growing-roses-in-pots.htm