Yes it does I can confirm that. I planted geraniums and all kind of herbs on my balcony for the last two years and the mosquitos did not eat or bite me up as it happen before. Geraniums are great for this purpose. Plant as many you can around the area you will be sitting in the summer along with lemon balm, mint, thyme and oregano even lemon grass if you're able to grow it. I have not found the seeds around here. Good Luck