Annual Agoseris

Large Flowered Agoseris (Agoseris grandiflora) should be watered daily or at least every other day. Water enough to keep the soil slightly moist, but not soggy, as this can cause root rot. In periods of high heat or drought, the plant may need to be watered more frequently. It is best to water the plant early in the day so it has time to absorb the moisture and dry out before nightfall.

Large Flowered Agoseris (Agoseris grandiflora) requires full sunlight for optimal growth. When grown in full sun, this plant species produces large, bold flower heads that are particularly showy. It is ideal that Large Flowered Agoseris be exposed to a minimum of 6-8 hours of direct sunlight everyday. During the peak of summer, it can tolerate up to 10-12 hours of direct sunlight. However, during the early summer months, it should only be exposed to a minimal number of hours of direct sunlight. Upon transitioning into fall, gradually give the plant less sunlight and move it to a more shaded spot.

For Large Flowered Agoseris (Agoseris grandiflora), pruning should be done in early spring, after the last frost, prior to new growth in April or May. Prune only back a few inches or when flowers start to fade. Pruning too much at 1 time may shock the plant and can cause it to suffer from damage or die back. Avoid pruning during hot weather to reduce chances for shock.