How can I make roses last longer in my home?

The ideal soil pH for roses is a soil that tests between 6 and 6.5. When the pH falls below 6, the soil will hold potassium, nitrogen and phosphorus molecules captive. When the pH level is higher than 7.5, many plants will struggle to get enough phosphorus, iron and manganese. Maybe you mean short or long stem cut roses. Try them in the ph balanced moist soil