According to the Food Channel, the world's largest zucchini on  record was 69.5 inches long and weighed 65 pounds. The grower was  Bernard Lavery of Plymouth Devon, UK.
Munchen (Germany) is 820 kilometers (or 510 miles) from Amsterdam (The Netherlands).
Are you going one way. in that case take the train see http://reiseauskunft.bahn.de/bin/query.exe/en. There is one (partly high speed) direct ICE train dep Amsterdam at 06:30 in the morning from Amsterdam centraal it will arrive at 14:10 in Munchen at the moment it will cost you one way each about Euro 140.