They can be but they will not survive.
I the soring
Cacti would have to be planted in pots and moved indoors during cold, wet weather or planted in a heated greenhouse.
Pepper plants can only be planted when there is no chance of freezing weather or frost.
The size of the plant to be planted out is not important if well grown, in fact the bigger the plant the quicker it will fruit, however the weather conditions must be suitable.
The different types of weather and climate it is outside
The different types of weather and climate it is outside
It helps plants to grow when planted It helps plants to grow when planted
By the shape of their leaves, also you would have planted in rows, plants outside the rows will be weeds.
Xerophytic plants can be planted during dry season.
Ferns
Cyclamen can be planted outdoors. They are hardy plants and can withstand cold winters, and even snow. Plant these plants where they have a buffer, such as near shrubs, trees, and buildings.
That depends on who they are, where they are, and for what purpose the plants are being grown.
Corn and most other plants are generally planted in dirt.