Lack of oxygen and or water.
Flower petals turn brown due to natural aging, damage to the petals or because of funghi. Regarding natural aging and damage to the petals the browning is simply the decomposition of the plant.
China rose petals have a natural pigment that changes color based on the pH of the solution they are in. In acidic solutions, the petals will turn red, while in basic solutions, the petals will turn blue or purple. This color change can be used as an indicator to determine the pH of a solution.
UV light
There are indefinite number of petals in rose flower due to conversion of stamens in to petals
Rose petals would likely turn red or pink in an acidic environment, due to the change in pH affecting the pigments responsible for their colour.
If you can find someone to give them to you then they are free. But if you want them from an actual store you have to pay for them. They sell real rose petals as well as fake rose petals.
Diamond is the metal that can destroy rose petals if they are put around the diamond.
Yes, there are many recipes with rose petals. Rose jam for example, or rose preserves.
The rose is a symbol of the Goddess Aphrodite. The number of petals on a rose are often symbolized in numerology.
China rose petals are called "चाइनी गुलाब के पत्ते" in Hindi.
Petals: 5 Sepals: 5
No, smoking rose petals will not get you high. Roses do not contain any psychoactive compounds that produce a high when smoked. Smoking rose petals may produce a pleasant aroma but will not have any intoxicating effects.