While asters prefer cooler conditions that does not mean the plants can not survive and even thrive during stretches of hotter conditions, especially once they are established. The flowers do best when the temperatures are cooler in the late summer and fall. Since asters prefer moist soil, it is important that they receive enough water/precipitation to keep them growing during hot and/or dry stretches.
Hot weather can cause plants to be affected, which is why it is important in warmer climates to plant them in an area where they receive some shade during the midday sun. And once cooler temperatures return they tend to bounce back quite well.
Hi JR,
While asters prefer cooler conditions that does not mean the plants can not survive and even thrive during stretches of hotter conditions, especially once they are established. The flowers do best when the temperatures are cooler in the late summer and fall. Since asters prefer moist soil, it is important that they receive enough water/precipitation to keep them growing during hot and/or dry stretches.
Hot weather can cause plants to be affected, which is why it is important in warmer climates to plant them in an area where they receive some shade during the midday sun. And once cooler temperatures return they tend to bounce back quite well.