florist
there called a horticulturalist ...
A person who studies nuts is known as a botanist. Botanists are experts who mainly study plants and their structural adaptations.
I think an optometrist? Not sure.
They are called physiologists.
A Botanist A pomologist studies fruit trees. Pomology is the study of fruit trees. Fruticulture is field of care and production of fruit trees.
florist
A Botanist is someone who studies plants.
Botanist / herbologist studies plants, people who cultivate cannabis are considered growers
Biologist
Agronomist is a person who studies the soil and the plants.
You call someone that studies metal a metallurgist.
A physicist.
A person who studies plants could be an agronomist or a botanist.
Botany
a person who studies planets is a planetologist.
There is no special name for someone who studies Hebrew.
An Anthropologist.