Miniature roses

Question

So a few days after buying it, my miniature roses started exhibiting the following symptoms:

1. Prematurely wilting rose buds – the petals would yellow and eventually acquire a sort of crisp texture. Some of them also had stalks that started blackening. It started with the really young ones, but as you can see in the first picture, even the bigger ones are starting to have this problem (I swear this one happened in 1-2 days though) [refer to pictures 1-2]

2. The leaves are starting to yellow. Mostly the leaves in the inner part of the pot – I’ve been told this is normal for roses in winter, and I do think it’s because they don’t receive enough sunlight? [refer to picture 3]

3. Black marks on the roses – this just appeared today and it’s only on one leaf? [refer to picture 4]

so sorry for the multiple posting – reposting this with the pictures because I didn’t attach properly in the previous one.

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Answer 1

Roses definitely need full sun, at least six hours a day. These issues may be water related though, in pots roses need to be watered thoroughly and frequently but water only at the soil, never water from above wetting the foliage or flowers. These articles should help

https://www.gardeningknowhow.com/ornamental/flowers/roses/starting-a-rose-garden.htm
https://www.gardeningknowhow.com/ornamental/flowers/roses/yellow-rose-leaves.htm