First, read the English article below.

You can start harvesting the fennel leaves once the plant becomes well-established.  Don't take too many leaves at once though, or you might harm the plant. The fennel leaves can be used to add an aromatic, anise or licorice flavor to soups, salads and other Mediterranean-style diets. If you use fennel regularly, try planting multiple plants. Harvest one plant a week, but remember to keep watering and fertilizing the plant after harvest. Florence fennel bulbs can be harvested once they reach the size of a small tennis ball, usually in late summer/early autumn.  To harvest, cut the fennel below the bulb at the soil line. Use immediately, or store in the refrigerator for several days. Fennel bulbs will survive a frost or two, so there is no rush to harvest them as soon as the weather turns cold. However, you shouldn't allow the fennel bulb to grow too large, or it will turn bitter. Fennel seeds can be harvested as soon as they're ripe and the plant's flowers have turned brown.  The seeds are very loose, so the best way to collect them is to place a large bowl or sheet underneath the plant and shake the seed head. Alternatively, you can wrap the seed heads with cheesecloth while you're cutting the stalks and remove the seeds later. Allow the seeds to dry completely, then store them in a cool, dark place in an airtight container. They will keep for up to six months. Fennel grows as a hardy perennial between USDA hardiness zones 5 and 10. It self-sows very easily, so if it has bloomed once, the seeds will have likely fallen to the ground, allowing it to re-emerge the following spring.  Every spring, you should fertilize your fennel patch with a standard fertilizer, or nourish the soil with some fresh (preferably homemade) compost. However, in northern zones (or areas where winter temperatures regularly drop below 15 degrees F/ -10 degrees C) fennel should be treated as an annual and will need to be replanted each spring. 

Now, please write a short abstract for it in Indonesian. Abstract:
Panen daun adas. Panen umbinya. Panen biji adas. Tinggalkan adas untuk tumbuh sebagai tanaman abadi.