It is not too late to plant
Plant early in the morning or late afternoon to avoid the hottest part of the day. Also, keep plants in the shade until you are ready to use them.
This time of year is much warmer and drier than the typical planting months of April and May. New additions to the garden will require special attention. The most important of which is to water frequently. New plants have limited root systems and they will need constant watering until they get established, as often as twice a day during hot and dry weather.
Use quality soil, like Mark’s Choice flower and veggie soil (Home Hardware item# 5053-695) for best results.
Water in the morning to reduce the amount of moisture lost to evaporation. Water deeply to encourage deeper roots.
Along with watering frequently, add at least four inches (10cm) of mulch around new plantings to insulate the soil and conserve moisture. If planting trees, use a thicker layer of mulch around the base while keeping it away from the trunk.
The use of Plant Prod Ultimate Plant Starter 10-52-10 will help plants get established faster by stimulating rapid root growth. Do not be afraid to plant now as there is still a lot of time left in the growing season. Plus, as an added bonus, one benefit of planting late is that you can get most everything on sale at your local garden retailer which saves you money.