Potato Soup Boil Potatoes

After reading the track and after the appropriate arguments I have identified five fundamental entities for the construction of the project:
Specie_esistenti I will need to group all plant species existing in the world which will give a name picture (link), a brief description, any information on growing, I suggested that a species can contain only plants or indoor or only external
Piante_vivaio I use to store all the plants in the nursery divided by name, type, price, and copy number stagione_fioritura present;
Staff that will contain all the information relating to employees of the nursery (including agronomists) divided by name, surname, date of birth, title, year of recruitment;
Attività_esterne that will be used to track all activities outside the nursery that can be made, divided by name, code, cost,
Customers , I assumed that the customer should exist when making a request to intervene in this entity then will be: type of user (whether individual or company) name, phone, giorno_prenotazione, mese_prenotazione, anno_prenotazione (so divided for ease of query), the date of execution of the operation.