diff --git a/src/main/java/ch/zhaw/gartenverwaltung/gardenplan/Gardenplanmodel.java b/src/main/java/ch/zhaw/gartenverwaltung/gardenplan/Gardenplanmodel.java
new file mode 100644
index 0000000..24757bd
--- /dev/null
+++ b/src/main/java/ch/zhaw/gartenverwaltung/gardenplan/Gardenplanmodel.java
@@ -0,0 +1,8 @@
+package ch.zhaw.gartenverwaltung.gardenplan;
+
+public class Gardenplanmodel {
+//    private JasonGardenplan gardenplan;
+    // liste von crops
+    //task generieren
+    //plant holen, task template mit tasktemplateklasse tasks erstellen
+}
diff --git a/src/main/java/ch/zhaw/gartenverwaltung/io/JsonTaskDatabase.java b/src/main/java/ch/zhaw/gartenverwaltung/io/JsonTaskDatabase.java
new file mode 100644
index 0000000..e16a74d
--- /dev/null
+++ b/src/main/java/ch/zhaw/gartenverwaltung/io/JsonTaskDatabase.java
@@ -0,0 +1,126 @@
+package ch.zhaw.gartenverwaltung.io;
+
+import ch.zhaw.gartenverwaltung.types.Task;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.datatype.jdk8.Jdk8Module;
+import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
+import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateDeserializer;
+
+import java.io.File;
+import java.io.IOException;
+import java.net.URL;
+import java.time.LocalDate;
+import java.time.format.DateTimeFormatter;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * Implements the {@link TaskDatabase} interface for loading and writing {@link Task} objects
+ * from and to a JSON file.
+ * The reads are cached to minimize file-io operations.
+ */
+public class JsonTaskDatabase implements TaskDatabase{
+    IdProvider idProvider;
+    private final URL dataSource = getClass().getResource("taskdb.json");
+
+    private Map<Long, Task> taskMap = Collections.emptyMap();
+
+    /**
+     * Creating constant objects required to deserialize the {@link LocalDate} classes
+     */
+    private final static JavaTimeModule timeModule = new JavaTimeModule();
+    static {
+        DateTimeFormatter dateFormat = DateTimeFormatter.ofPattern("yyyy-MM-dd");
+        LocalDateDeserializer dateDeserializer = new LocalDateDeserializer(dateFormat);
+        timeModule.addDeserializer(LocalDate.class, dateDeserializer);
+    }
+
+    /**
+     * If no data is currently loaded, data is loaded from {@link #dataSource}.
+     * In any case, the values of {@link #taskMap} are returned.
+     *
+     * @see TaskDatabase#getTaskList(LocalDate, LocalDate)
+     */
+    @Override
+    public List<Task> getTaskList(LocalDate start, LocalDate end) throws IOException{
+        if(taskMap.isEmpty()) {
+            loadTaskListFromFile();
+        }
+        return taskMap.values().stream().filter(task -> task.isInTimePeriode(start, end)).toList();
+    }
+
+    /**
+     * If no data is currently loaded, data is loaded from {@link #dataSource}.
+     * If the {@link Task} has an id than the task is added to the {@link #taskMap}
+     * otherwise the id is generated with the {@link IdProvider} before adding
+     * it to the {@link #taskMap}. In any case, the {@link #taskMap} is written
+     * to the {@link #dataSource}.
+     *
+     * @see TaskDatabase#saveTask(Task)
+     */
+    @Override
+    public void saveTask(Task task) throws IOException {
+        if(taskMap.isEmpty()) {
+            loadTaskListFromFile();
+        }
+        if(task.getId() == 0) {
+            task.withId(idProvider.incrementAndGet());
+        }
+        writeTaskListToFile();
+    }
+
+    /**
+     * If no data is currently loaded, data is loaded from {@link #dataSource}.
+     * If the {@link Task}s id is found in the {@link #taskMap}, the Task is removed
+     * from the  {@link #taskMap}. Then the Task are written to the {@link #dataSource}.
+     *
+     * @see TaskDatabase#removeTask(Task)
+     */
+    @Override
+    public void removeTask(Task task) throws IOException {
+        if(taskMap.isEmpty()) {
+            loadTaskListFromFile();
+        }
+        if(taskMap.containsKey(task.getId())){
+            taskMap.remove(task.getId());
+            writeTaskListToFile();
+        }
+    }
+
+    /**
+     * Writes cached data to the {@link #dataSource}.
+     *
+     * @throws IOException If the database cannot be accessed
+     */
+    private void writeTaskListToFile() throws IOException {
+        ObjectMapper mapper = new ObjectMapper();
+        mapper.registerModule(timeModule)
+                .registerModule(new Jdk8Module());
+
+        if(dataSource != null) {
+            mapper.writeValue(new File(dataSource.getFile()), taskMap);
+        }
+    }
+
+    /**
+     * Loads the database from {@link #dataSource} and updates the cached data.
+     *
+     * @throws IOException If the database cannot be accessed
+     */
+    private void loadTaskListFromFile() throws IOException {
+        if (dataSource != null) {
+            ObjectMapper mapper = new ObjectMapper();
+            mapper.registerModule(timeModule);
+
+            List<Task> result;
+            result = mapper.readerForListOf(Task.class).readValue(dataSource);
+
+            taskMap = result.stream()
+                    .collect(HashMap::new,
+                        (res, task) -> res.put(task.getId(), task),
+                        (existing, replacement) -> {});
+        }
+    }
+}
diff --git a/src/main/java/ch/zhaw/gartenverwaltung/io/TaskDatabase.java b/src/main/java/ch/zhaw/gartenverwaltung/io/TaskDatabase.java
index 73cf8e0..19ad778 100644
--- a/src/main/java/ch/zhaw/gartenverwaltung/io/TaskDatabase.java
+++ b/src/main/java/ch/zhaw/gartenverwaltung/io/TaskDatabase.java
@@ -1,13 +1,42 @@
 package ch.zhaw.gartenverwaltung.io;
 
+import ch.zhaw.gartenverwaltung.types.HardinessZone;
+import ch.zhaw.gartenverwaltung.types.Plant;
 import ch.zhaw.gartenverwaltung.types.Task;
 
 import java.io.IOException;
+import java.time.LocalDate;
 import java.util.Date;
 import java.util.List;
 
+/**
+ * A database of {@link Task}s.
+ * The interface specifies the minimal required operations.
+ */
 public interface TaskDatabase {
-    List<Task> getTaskList(Date start, Date end);
+    /**
+     * Yields a list of all {@link Task}s in the database with the start and end date of a period of time.
+     *
+     * @param start The start date of the wanted time period
+     * @param end The end date of the wanted time period
+     * @return A list of {@link Task}s planned in the specified time period
+     * @throws IOException If the database cannot be accessed
+     */
+    List<Task> getTaskList(LocalDate start, LocalDate end) throws IOException;
+
+    /**
+     * Saves the {@link Task} in the Cache.
+     *
+     * @param task The {@link Task} which is wanted to be saved in the TaskList
+     * @throws IOException If the database cannot be accessed
+     */
     void saveTask(Task task) throws IOException;
+
+    /**
+     * Removes the {@link Task}from the Cache.
+     *
+     * @param task The {@link Task} which has to be removed from the {@link Task} list.
+     * @throws IOException If the database cannot be accessed
+     */
     void removeTask(Task task) throws IOException;
 }
diff --git a/src/main/java/ch/zhaw/gartenverwaltung/types/Task.java b/src/main/java/ch/zhaw/gartenverwaltung/types/Task.java
index 90e00f4..3b26745 100644
--- a/src/main/java/ch/zhaw/gartenverwaltung/types/Task.java
+++ b/src/main/java/ch/zhaw/gartenverwaltung/types/Task.java
@@ -16,11 +16,22 @@ public class Task {
     private Integer interval;
     private LocalDate endDate;
 
+    /**
+     * default constructor
+     * (used by Json deserializer)
+     */
+    public Task(){
+        name= "";
+        description= "";
+        startDate = LocalDate.now();
+    }
+
     public Task(String name, String description, LocalDate startDate) {
         this.name = name;
         this.description = description;
         this.startDate = startDate;
     }
+
     public Task(String name, String description, LocalDate startDate, LocalDate endDate, int interval) {
         this.name = name;
         this.description = description;
@@ -43,6 +54,13 @@ public class Task {
         return this;
     }
 
+    public boolean isInTimePeriode(LocalDate searchStartDate, LocalDate searchEndDate){
+        if(startDate.isAfter(searchStartDate) &&startDate.isBefore(searchEndDate)){
+            return true;
+        }
+        return false;
+    }
+
     // Getters
     public long getId() { return id; }
     public String getName() { return name; }
diff --git a/src/main/resources/ch/zhaw/gartenverwaltung/io/taskdb.json b/src/main/resources/ch/zhaw/gartenverwaltung/io/taskdb.json
new file mode 100644
index 0000000..da201c9
--- /dev/null
+++ b/src/main/resources/ch/zhaw/gartenverwaltung/io/taskdb.json
@@ -0,0 +1,50 @@
+[
+  {
+  "id" : 1,
+  "name" : "sow plant",
+  "description": "Plant the seeds, crops in de bed.",
+  "startDate" : "2022-05-01",
+  "endDate" : "2022-05-01",
+  "interval" : 0
+  },
+  {
+    "id" : 2,
+    "name" : "water plant",
+    "description": "water the plant, so that the soil is wet around the plant.",
+    "startDate" : "2022-05-01",
+    "endDate" : "2022-09-01",
+    "interval" : 2
+  },
+  {
+    "id" : 3,
+    "name" : "fertilize plant",
+    "description": "The fertilizer has to be mixed with water. Then fertilize the plants soil with the mixture",
+    "startDate" : "2022-06-01",
+    "endDate" : "2022-08-01",
+    "interval" : 28
+  },
+  {
+    "id" : 4,
+    "name" : "covering plant",
+    "description": "Take a big enough coverage for the plants. Cover the whole plant with a bit space between the plant and the coverage",
+    "startDate" : "2022-07-01",
+    "endDate" : "2022-07-01",
+    "interval" : 0
+  },
+  {
+    "id" : 5,
+    "name" : "look after plant",
+    "description": "Look for pest or illness at the leaves of the plant. Check the soil around the plant, if the roots are enough covered with soil",
+    "startDate" : "2022-05-01",
+    "endDate" : "2022-09-01",
+    "interval" : 5
+  },
+  {
+    "id" : 6,
+    "name" : "harvest plant",
+    "description": "Pull the ripe vegetables out from the soil. Clean them with clear, fresh water. ",
+    "startDate" : "2022-09-01",
+    "endDate" : "2022-09-01",
+    "interval" : 0
+  }
+]
\ No newline at end of file
diff --git a/src/test/java/ch/zhaw/gartenverwaltung/io/JsonTaskDatabaseTest.java b/src/test/java/ch/zhaw/gartenverwaltung/io/JsonTaskDatabaseTest.java
new file mode 100644
index 0000000..e75ea40
--- /dev/null
+++ b/src/test/java/ch/zhaw/gartenverwaltung/io/JsonTaskDatabaseTest.java
@@ -0,0 +1,37 @@
+package ch.zhaw.gartenverwaltung.io;
+
+import ch.zhaw.gartenverwaltung.types.Task;
+import org.junit.jupiter.api.*;
+
+import java.io.IOException;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.List;
+public class JsonTaskDatabaseTest {
+
+    TaskDatabase testDatabase;
+    SimpleDateFormat formatter = new SimpleDateFormat("dd.MM.yyyy");
+    @BeforeEach
+    void connectToDb() {
+        // testDatabase = new JsonTaskDatabase();
+    }
+
+
+    @Test
+    @DisplayName("Check if results are retrieved completely")
+    void getTasks(){
+        /*
+        List<Task> taskList=null;
+        try {
+            taskList = testDatabase.getTaskList(formatter.parse("01.05.2022"), formatter.parse("01.08.2022"));
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        } catch (ParseException e) {
+            throw new RuntimeException(e);
+        }
+
+        Assertions.assertTrue(taskList.size()>0);
+        */
+    }
+}
diff --git a/src/test/resources/ch/zhaw/gartenverwaltung/io/taskdb.json b/src/test/resources/ch/zhaw/gartenverwaltung/io/taskdb.json
new file mode 100644
index 0000000..1155b9a
--- /dev/null
+++ b/src/test/resources/ch/zhaw/gartenverwaltung/io/taskdb.json
@@ -0,0 +1,50 @@
+[
+  {
+  "id" : "1",
+  "name" : "sow plant",
+  "description": "Plant the seeds/ crops in de bed.",
+  "startDate" : "01.05.2022",
+  "endDate" : "01.05.2022",
+  "interval" : "null"
+  },
+  {
+    "id" : "2",
+    "name" : "water plant",
+    "description": "water the plant, so that the soil is wet around the plant.",
+    "startDate" : "01.05.2022",
+    "endDate" : "01.09.2022",
+    "interval" : "2"
+  },
+  {
+    "id" : "3",
+    "name" : "fertilize plant",
+    "description": "The fertilizer has to be mixed with water. Then fertilize the plant's soil with the mixture",
+    "startDate" : "01.06.2022",
+    "endDate" : "01.08.2022",
+    "interval" : "28"
+  },
+  {
+    "id" : "4",
+    "name" : "covering plant",
+    "description": "Take a big enough coverage for the plants. Cover the whole plant with a bit space between the plant and the coverage",
+    "startDate" : "15.07.2022",
+    "endDate" : "15.07.2022",
+    "interval" : "null"
+  },
+  {
+    "id" : "5",
+    "name" : "look after plant",
+    "description": "Look for pest or illness at the leaves of the plant. Check the soil around the plant, if the roots are enough covered with soil",
+    "startDate" : "01.05.2022",
+    "endDate" : "01.09.2022",
+    "interval" : "5"
+  },
+  {
+    "id" : "6",
+    "name" : "harvest plant",
+    "description": "Pull the ripe vegetables out from the soil. Clean them with clear, fresh water. ",
+    "startDate" : "01.09.2022",
+    "endDate" : "01.09.2022",
+    "interval" : "null"
+  }
+]
\ No newline at end of file