Saving seed is easy when you know how. Step 1: Find a flower in bloom, and check it every day. The flower above is called Pot Marigold or Calendula. Step 2: After a few days, depending on the flower, it will start to wither. If you look behind the dead flowers, you may see seeds starting to form. Step 3: Once the petals have dropped completely, you will be able to see the seeds more clearly. Leave the seeds on the plant to ripen for several days before harvesting. ( in the picture above, the green seeds have still to ripen. The brown seeds are ripe and ready to sow.) This is a wallflower,. You can see the seed pods starting to form just below the remaining flowers. This is taken a few days later. You can see the seed pods starting to develop. (The seeds are inside the seed pod). In a few weeks, once the seed pods have turned brown, the seeds will be ripe and ready for harvest. Again, if you look closely, you can see in the center of this group of poppies, the seed pod is starting to emerge, as the flowers die back. To the left of the flowers are some ripe seed pods. So you see, it’s very easy to save seeds.