June Tasks

Water hanging baskets every day
Shade and ventilate greenhouses, and keep paths dampened on warm days.
Feed plants in borders, and start dead heading flowers.
Thin out hardy annuals and veg sown in the garden.
Remove suckers (growth from the roots) from roses, lilac and other suckering shrubs.
Remove spring bulb foliage when it will pull away easily.
Remove alge and blanket weed from ponds etc before it becomes a problem
Make sure that tall border plants are adequately supported: pea sticks or canes and string are usually sufficient.
It should now be safe to plant out remaining bedding, including those cannas and dahlias.