Harden off your half-hardy bedding plants by leaving them outside for the day and bringing them under cover at night. Do this for 7-10 days before planting out into beds, containers and hanging baskets.
Start to feed your container plants with a balanced fertiliser and continue every two to four weeks throughout the summer. Alternatively use a slow-release fertiliser.
Prune winter and spring-flowering Clematis such as 'Winter Beauty' and Clematis armandii now if they're out-growing their supports.
Prune spring-flowering shrubs such as Honeysuckle 'Winter Beauty' and Forsythia after flowering has finished.
Give your evergreen hedges a trim now whilst they are in active growth. Box, Privet and Yew can be trimmed twice each year during the growing season.
Now is the ideal time to give Lavender plants a trim to encourage bushiness. Clip about 2.5cm (1 inch) off the current year's growth.
Keep any new fruit trees well watered in hot weather. Remove any blossom or fruits during the first year to focus the plant's energy on growing roots.
Don't be tempted to cut down or tie up the leaves of your spring bulbs to tidy them up. The plants need the leaves to feed themselves for next year! Once the leaves start to yellow they can be removed.
Thin out any hardy annuals or vegetable seeds sown directly into the garden to the recommended spacings. Water the rows well afterwards to settle the soil around the seedlings.