Monkshood (Aconitum) grows from the end of the summer months and will continue to grow into the fall.
It is a tall plant that shoots up flowers in tall spikes. The flowers cluster at the top of the stems in resemblance to a weeping hyacinth: just much taller.
Aconitum will grow at its best in a cooler summer to fall temperature rather than in the hot summer sun. It also grows best buried deep in cool, fertile, well-drained soil.
If the plant is near the sun, it is ok. Just make sure it has partial shade. Too much sun will cause it to stop growing, but you want to let the plant get some sun.
Space each plant about 2 to 3 feet apart. Water the plant only when the soil is dry. If you water it too much the plant can become waterlogged.
It grows surrounded by dark green leaves. They gather around the mid to base of the perennial flower. Be careful of this flower if you have pets or small children, for it is poisonous.
The colors that your plant could grow in are pink, blue, yellow, or even a white flower with a blue hood. This plant gets its common name due to the top petal of each flower having a hood like shape.
I would recommend planting this plant as a border in a flower bed. Make sure it is at the back end of the bed though because this plant can get as tall as 5 feet.
This plant is a perennial plant that will grow again year after year. It does not however need to be divided and replanted. Once you find a place to plant your flower, be sure it is in a place where you want to keep it.
Since it is a poisonous plant it is best to keep it in that spot.