How To Care For Summer Hydrangeas. If youre not 100 sure what variety of hydrangea you have play it safe and simply deadhead it. Non-porous containers will retain moisture better helping your hydrangeas to thrive.
Plant hydrangeas at least four feet apart. Just make sure that your chosen pot is at least 18 inches in diameter. Late summer is one of the best times to plant hydrangeas as youll be able to make the most of their colours while they are still in bloom says gardening expert Narelle Peart from Scotts Osmocote.
Make sure to keep your arrangement out of direct sunlight.
Gently sow the seeds over the top layer of the soil and keep the soil moist at all times. Once you have the hydrangea you need to plant it properly. Dig a planting hole twice as wide and twice as deep as the root ball of the hydrangea from the pot. Its best to plant them in the early morning or late afternoon avoiding the hottest part of the day.