Top Jobs for June

 1. Prepare for drought – fit a water butt, mulch around plants and don’t cut the grass so short.

2. Liquid feed containerised plants every two to four weeks.

3. Keep tubs and hanging baskets well watered.

4. Think about your greenhouse – don't let it get too hot (apply shade paint, open doors, hose-down the floor)

5. Stake/support climbing/tall plants as they grow.

6. Protect crops from birds by putting up nets.

7. Look out for pest problems once the weather warms up.  



• Another constant task around the garden at this time of year is deadheading - remove spent flowers from containers, pots, hanging baskets, beds and borders and feed them all occasionally with liquid feed. Deadheading diverts energy from producing seed into producing new flowers.....so is a good thing all round.

• Plant out summer bedding and seed-raised plants, if not already done so.

• Thin out direct sowings of hardy annuals.

• Stake tall perennials to prevent wind damage to flower spikes.

• Cut back dead bulb foliage if not done already. It is important to wait until the foliage dies down naturally.

• Now is the time to lift and divide overcrowded clumps of bulbs after they have finished flowering so that you can increase your stock for next year.

• Any gaps in your herbaceous borders should be filled with summer bedding plants for now.

• Cut back clumps of spring-flowering perennials such as Helleborus, Pulmonaria to encourage fresh foliage. - This will also encourage the plants to stay more compact and will flower better next year.

• Trimming back spreading and trailing plants such as the annual Lobularia (sweet alyssum) after flowering will encourage fresh growth and new flowers. • Cut back Oriental poppies after flowering to stimulate growth of fresh new foliage.

• Remove suckers from Rose bushes when they are seen.

• Sprinkle Rose Plus around Rose plants to encourage strong growth and a good flower display.

• Help Sweet peas find their supports to encourage them to climb and give a good display.

• Pinching out the leading shoots on Chrysanthemum and Helianthus will encourage bushy plants. You can always leave them if you want tall plants.

• Divide primroses after flowering and keep them planted in a nursery bed until the autumn.

• Divide hostas as they come into growth.

• Deadhead flowering perennials such as Lupinus and Delphinium to promote a second flush of flowers later in the season.

• Lift clumps of forget me nots as these can get out of control. • Hellebore seed can be harvested once the seed heads have ripened - sow them straight away for growth next year.

• Plant up window boxes and troughs

• Water newly planted shrubs and perennials in dry periods.



• Start to thin out fruit on most fruit trees.

• Tie new canes of Raspberries and Blackberries onto wires, keep them separate from last years growth.

• Pick Rhubarb regularly and do not allow it to form flower spikes. • Remove damaged branches from Damsons and Plums.

• Spread nets over soft fruit bushes.

• Check fruit cages for tears or damage.

• Put straw under Strawberries to protect from slugs.  



 • Thin out rows of previously sown vegetables allow them to reach their potential.

• Plant leeks when the plants are as thick as a pencil.

• Finish harvesting Asparagus.

• Keep onions well watered to ensure that the bulbs swell.

• Pull up soil around main crop potatoes.

• Plant leeks when the plants are as thick as a pencil.

• Pinch out tips of broad beans to discourage black fly.  



• Mow lawns more frequently to keep them healthy, and reduce the cutting height - removing a 'little and often' is the key.

• Cut the lawn edges to keep them neat and well shaped. At the same time create a 3in gutter to define the lawn edge from the flower border.

• Apply a high nitrogen summer lawn fertiliser if not done last month to - encourage a healthy-looking lawn.

• Moving garden furniture etc regularly to stop the grass underneath from dying off.

• Selective weedkillers are available for lawns that will kill the weeds but not the grass. Moss killers are also available. These chmicals all work differently so ask your gardener for advice.

• Disperse dry worm casts with a hard-bristled broom.

• If molehills are a problem then traps are the most effective way to deal with them. Ant hills will also cause bumps in your lawn at this time of year.

• Water in dry spells provided that there is no hosepipe ban - we have a wide range of garden watering products


Greenhouse, Sheds and House plants

• Move conservatory plants outdoors during warm days but bring in if the temperature is expected to fall at night.

• Train passion flowers and other climbers over their supports.

• Opening doors and vents on hot days will also help.

• Soak the floor morning and evening to keep up humidity

• Use a shade paint or netting on greenhouses to prevent over heating and scorching of tender plants.

• Feed all plants at least once a week. • Use a biological pest control or fumigate if pests are a problem .

• Ensure that there is adequate ventilation. • Continue training and feeding cucumbers and melons.

• Pick male flowers from cucumbers and pollinate female flowers.  


Trees, Shrubs, Climbers and Hedges

• Tie in climbing and rambling roses as near to horizontal as possible to restrict sap flow and cause more side-shoots to grow along the length of stem resulting in more flowers.

• Prune out any frost damage from evergreen shrubs.

• Cut back tender shrubs such as Penstemon, Caryopteris and hardy fuchsias now that the danger of frosts has past.

• Prune flowering shrubs such as Deutzia, Kolkwitizia, Weigela and Philadelphus after they have finished flowering. If you leave this too late the flowers may not have enough time to develop for next year.

• Continue to clip evergreen hedges such as privet and box.

• This is the best time of year to prune deciduous magnolias once the plant is in full leaf.

• If necessary, thin out new shoots on trees and shrubs pruned in the winter to prevent overcrowding.

• Prune overcrowded, dead or diseased stems from Clematis montana once it has finished flowering – it can take cutting back very hard.

• Prune wall-trained pyracanthas, removing any shoots coming out from the wall, and shortening other new growth to about 8cm.

• Remove any reverting shoots on hardy variegated evergreens, to prevent them reverting to just one colour.

• Take softwood cuttings of deciduous shrubs including Caryopteris, Forsythia, lavender, Fuchsia, Hydrangea macrophylla, Philadelphus and Spiraea and rosemary if not done last month.


Soils, mulching and weed control

• Remember that it’s not only the flowers that are flourishing this month, the weeds are thriving too, so keep on top of the situation; hoe on warm days and leave them on the surface to wither and die in the sun.


Pond Care

• Thin out, cut back or divide excessive new growth on aquatic plants and tidy up the bog garden.

• Water lilies are big feeders – if not already done so feed with a slow-release fertiliser tablet (place in the soil around the base of the plant.

• Keep ponds and water features topped up and clean out pond filters. • If you live in the north you can still plant new aquatic plants.

• Remove blanket weed from the pond and then leave the weed on the side of the pond for a day to allow trapped creatures to return to the water before adding to the compost heap. 


Plants which are at their best in June

Lupinus (Lupins)

Violas Deutzia Lavendula (Lavender)

Philadelphus varieties (Mock Orange)

Papaver (Poppy)

Hosta varieties (Plantain Lily)

Hardy Geraniums (Cranesbill)

Paeonies (Peony)

Campanula (Bellflower)


TOP TIP: Watering is essential once the weather is drier and warmer - water thoroughly once or twice a week rather than little and often (containers and hanging baskets need watering every day and sometimes even twice a day if it is hot and windy) - this encourages plants to put down roots in search of water rather than coming up to the surface. For large shrubs or trees, leave a hose trickling around the base for an hour - hedges are best watered with a trickle hose (a length of old hose punctured with little holes) left running for an hour or so.


TOP TIP: The key to successful planting, whether it be a shrub, tree, perennial or bedding plant is to water in well. Beforehand, soak the rootball in a bucket until no air bubbles come to the surface, dig the planting hole, fill with water and allow to drain away. Place the plant in the hole, fill with soil, firm gently and water with a watering can - this will give the plant a huge advantage over one planted with a dry rootball in a dry hole and watered only on the surface.