pointers - C: free memory allocated in c

suppose i have a struct:

typedef struct{
    char *ID;
    char *name;
    float price;

    int quantity;
} Generic_Properties;

now if i have used malloc to allocate space in the heap for it and saved the address in a pointer, lets call him p1. now i want to free that specific memory block, is it enough to just declare free(p1):

free(p1);

or do i need to separately free ID and name pointers, because I used malloc to allocated space for the string they're pointing to?