Cold weather slows down a plants growth.

Uh there is no question but your statement is true, extremly hot or cold weather conditions could cause the plants growth to slow down. But the tempretures vary depending on the type of plant.

I don't see a question but what you said is correct. Plants will die in cold weather. Cold weather, particularly frost, causes the water in plant cells to freeze, damaging the cell wall. Roots are unable to take up water and plants die from lack of moisture. Periods of cold, frosty weather during April and May can also kill blossom and damage fruit.

Hoped it helped :D

the present continuous is a verb tense which is mainly used to indicates that an action is in progress at the moment of speaking.  

it is formed using: person + verb to be (am/is/are) +verb + - ing form  

example: i am studying at this moment .

in addition, the present continuous is also used in order to express things that will or will not happen in the near future.

example: i am having dinner with some friends tonight.

the speaker sometimes   uses it   to express that an action is repeated and it causes irritation on the part of the speaker

example: my sister is constantly complaining about everything.

yup its an addiction