Matricaria is ready to harvest for the vase when fully open. If cut too early, the flowers will droop, as their stems will not be strong enough to hold the flower upright. Once cut, immediately plunge in fresh water. If you add a holding solution to the water, the flowers can last up to 2 weeks. Since Matricaria are not sensitive to ethylene gas, you can store the blooms in a refrigerator to extend their life. Pests are rarely a concern with Matricaria, but stay alert aphids, thrips, leaf miners and caterpillars as always. Sometimes gardeners see leaf burn and rosetting due to lack of enough sunlight - these daisy-like dudes can’t get enough light! Also - because Matricaria is self-seeding, it will fill a garden bed easily - watch out and take care that the seed doesn't blow everywhere!