Summer might be very hash to the plants. Many saplings might dry out due to the heat of the sun. To prevent this there is a simple hack where you can protect saplings and small plants drying out in summer.
Cover a terracotta pot on the seedlings or saplings when the temperature is high for some time which protects the seedlings from drying.
Remember - Do not place the pot in the morning as morning sunlight is necessary for the plants to grow.