conn = ConnectionManager.getConnection();
            PreparedStatement stmt = conn.prepareStatement(queryElencoPiante);
            stmt.setInt(1, userID);
            ResultSet rs = stmt.executeQuery();
            JSONArray result = new JSONArray();
            JSONObject obj;

            while (rs.next()) {
                obj = new JSONObject();
                obj.put("ID", rs.getInt("id"));
                obj.put("nomeAssegnato", rs.getString("nomeAssegnato"));
                obj.put("nomePianta", rs.getString("nomePianta"));
                obj.put("immagine", rs.getString("immagine"));
                obj.put("livelloAcqua", Utils.calcolaLivello(rs.getLong("ultimaAcqua"), rs.getInt("intervalloAcqua")));
                obj.put("livelloConcimazione", Utils.calcolaLivello(rs.getLong("ultimoFertilizzante"), rs.getInt("intervalloConcimazione")));
                result.add(obj);
            }

            response.setContentType("application/json; charset=UTF-8");
            response.getWriter().write(result.toString());

            rs.close();
            stmt.close();
            conn.close();