Potted indoor roses are not decoration, but a time bomb.
Store-bought plants are filled with stimulants, and without your help they will die within a month.
The first mistake is replanting immediately after purchase. Give the rose 2 weeks to adapt, and only then change the soil.

The second mistake is watering from above. Water that gets on the leaves provokes powdery mildew. Pour water only into the tray, and place the pot itself on a layer of expanded clay.
The third mistake is "pity" for wilted flowers. Cut off the buds immediately after wilting, otherwise the rose will waste energy on seeds.
But the main secret is the "night diet". Once a week, take the plant out onto the balcony or to an open window for the whole night - the temperature difference strengthens the immune system.
And for emergency resuscitation, dissolve an aspirin tablet in a liter of water and spray the leaves - salicylic acid will revive even a half-dead bush.
But that's not all. Roses hate being crowded. If you have several bushes growing in a pot, plant them apart - competition for light and water kills the roots.
Another enemy is dry air from radiators. In winter, place bowls of water or wet expanded clay next to the roses.
And if the leaves are covered with cobwebs, it is a spider mite. Immediately bathe the rose under a warm shower, wrapping the pot in a bag so as not to wash away the soil. After that, spray with tobacco infusion (50 g per liter of water).
Don't forget about the "tricky" fertilizer. Once a month, bury used tea bags in the soil - tannin strengthens the roots.
And for lush flowering, dilute hydrogen peroxide in water (1 tablespoon per liter) - this saturates the soil with oxygen.
But if the rose still withers, check the roots: black and slippery ones are a sign of rot.
Cut off the affected parts, treat with potassium permanganate and transplant into soil with the addition of charcoal.