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Gardening Tips For July

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Gardening in July: This is one of the most productive months in the garden, but there’s still time to plant and plenty to enjoy

Perennials

  • Keep up with deadheading bedding plants, sweet peas and roses. The flowers on dahlias will need to be cut off once they’ve started to fade.
  • Many of the traditional English cottage perennials such as lupins, delphiniums and geraniums are starting to look past their best now so cut them right back down and they’ll resprout. They may not flower again but they’ll look a lot better.
  • delphiniums in a garden
Fruit and vegetables
  • Water and feed everything regularly, especially tomatoes, to avoid problems. Also tie them in to their canes and pinch out the side shoots if necessary.
  • The last sowing of French beans and carrots can be done now. Transplant purple sprouting broccoli and winter leeks to their final position, or buy them as plugs from a garden center or nursery.
  • Keep sowing seeds for salads, a few at a time, as well as autumn crop peas, turnips and spring cabbages.
  • Keep an eye on apples and plums to make sure there are not too many on each stem and thin out if necessary – just three or four is enough.
  • There should still be some strawberries ripening. Check there is enough straw under the plants to keep fruit off the soil. If you’ve been pegging down the strawberry runners, by now they should have formed enough roots to enable you to transplant them, either to pots to keep safe until they can be put in the ground, or straight into a new strawberry bed.
courgettes - nice ripe Zucchinis growing over garden fence

Harvest

  • Strawberries and other soft fruit should be ripe and ready to collect now.
  • Pick and freeze or dry herbs so they can be used later.
  • A lot of the earlier-sown vegetables will be ready in July, for instance peas and broad beans, French and runner beans, globe artichokes, carrots and beetroot.
  • Keep an eye on fruit; cherries, peaches, gooseberries, raspberries and early plums are really starting to ripen.

Watering

  • This is something that’s easy to do, but easy to get wrong, and often the main problem is under watering. If you spray an area of planting for one minute and move on, the water is unlikely to have gone deeper than a few millimeters into the soil, so won’t have penetrated anywhere near the roots.
  • You need to water like a rain cloud. One way to test this is to put a jam jar in among the plants you’re watering and stop when there’s about 2cm of water in the jar. That’s likely to take about 10-20 minutes on each area, which is understandably daunting. It’s one of the reasons why leaky hose systems, which deliver water to the soil via a porous hose and operate at the turn of a tap, are so appealing.
  • It’s a good time to get rid of strongly growing perennial weeds such as ground elder and bindweed. Use a systemic weed killer such as glyphosate that will enter the weed through its leaves and should kill it off.
Planting trends from the Chelsea Flower Show 2017

Roses

  • July in rose-growing circles is known as the month for black spot. If you find it, remove the affected leaves and spray the plant with fungicide. The same goes for another fungus, mildew, which can also become a problem in July if the roses are stressed by having too much or too little water. Try to spray the fungicide early in the morning so you don’t affect any bees that might be buzzing around the plant. Finally don’t forget to deadhead the roses to keep them flowering.
Pink rose flowers in a garden

Roses are the epitome of summer but check for pests and diseases in July

Lawn

  • Keep mowing the lawn if it’s not parched and, if it’s looking tired, July is the last opportunity to apply a summer fertilizer. If it’s dry you may need to water your lawn. Use a specialist lawn weed killer if necessary.

Hedges

  • If you have a conifer hedge, especially a leylandii one, keep a close eye on it at this time of year for cypress aphids. It’s difficult to see the aphids themselves so look for brown patches in the hedge and a black sooty mold along the stem. If you find it, the best thing to do is prune out any brown shoots and spray affected areas with pesticide.

Deadheading bedding plants and border perennials is important to keep your displays looking fresh and tidy. Get more flowers in borders, containers and hanging baskets by adding a liquid feed once a week.

IF YOU ONLY DO ONE THING…

…Go into borders, lift leaves and have a look around. Often it’s not a good idea to go looking for problems, but in the garden it pays to have a rummage, as the fresh growth of the past months can hide and feed pests, and weeds can grow unseen under it.

August Gardening Tips for the Northeast

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The garden is at its peak, and long days offer ample time for picking fresh flowers and sun-ripened produce.

Temperatures Soar and Color Sizzles

Some plants thrive as summer heats up. If your perennial beds lack color, try a few of these plants that flower through sweltering August afternoons. All are drought-tolerant once established.

Black-eyed Susan (Rudbeckia spp.) brightens the garden with cheery yellow blooms perfect for cutting. It’s a good choice for a wildlife garden. Flowers beckon butterflies; seed heads are a goldfinch favorite.

Russian sage (Perovskia atriplicifolia) unfurls silvery foliage accented with lavender blooms. Plants are deer-resistant.

Threadleaf tickseed (Coreopsis verticillata) opens daisylike blooms in shades of yellow, white, or pink. Low-maintenance plants have fine foliage and open flowers steadily until frost.

Yarrow (Achillea) sounds a steady note of drought-resistant color in the summer garden. Look for flowers in many shades, from white, to red, to peach, to yellow.

Test Garden Tip: Even the most reliable summer bloomers stage a stronger show when you faithfully remove faded flowers.

August Watering Tips

Water plants a few hours before applying pesticides, especially during times of drought. In these conditions, plants have less water in tissues, and as pesticides enter cells, they may burn leaves.

Avoid watering during midday, when more water will evaporate than soak into soil.

It’s not uncommon for plants to wilt on hot afternoons even though soil has adequate moisture. The wilting occurs because plants are losing water faster than their roots can absorb it. Leaves should revive by early evening, after the sun is no longer directly on leaves. If not, water deeply.

Some shrubs need weekly deep watering now. Rhododendrons are beginning to form flower buds for next year’s show, and adequate water is vital. Fruiting plants, such as hollies and firethorn, need water to ensure berries mature and don’t drop.

Test Garden Tip: Water newly planted trees, shrubs, and perennials — any plants you added to your yard last fall or spring. These plants need weekly irrigation to ensure roots establish deeply.

Garden-Fresh Flavors from the Herb and Vegetable Garden

Peppers: Pick peppers at any stage of development. The longer fruits stay on a plant, the more intense flavor becomes — sweet peppers grow sweeter, and hot peppers develop a stronger burn.

Herbs: It’s best to pick herbs before they flower. Harvest herbs on a dry morning, after dew has dried. The exception is mint, which you want to pick at midday, when essential oil concentrations in leaves are greatest. Avoid harvesting herbs following a rain, when foliage is wet.

Tomatoes: Even though tomatoes continue to ripen after picking, fruits develop greatest flavor when allowed to ripen on plants. The exception is cherry tomatoes, which are prone to splitting. Pick these tasty morsels as soon as fruits start showing color.

It’s Time to Stop…

Fertilizing roses. Stop feeding roses this month so that growth can harden sufficiently before killing frost arrives. This will help reduce the amount of winter kill.

Pruning evergreens. As August arrives, put away the pruners as far as evergreens are concerned. If you prune now, you risk plants pushing new growth, which won’t harden off and will be killed during winter’s chill.

Ignoring zucchini. Daily inspections of squash vines are a must. In August heat, small, tasty fruit can transform into inedible baseball bats overnight.

Composting weed seeds. Unless your compost pile gets hot enough to kill seeds, it’s best to destroy weeds with seed heads. If your town has a community composting facility, place seedy weeds at the curb. The community compost will be hot enough to kill seeds.

August Garden Chores for the Northeast

Pull annuals that are past their prime and aren’t likely to recover. Cover bare soil to deter weeds.

Take cuttings of plants you want to overwinter. Choices may include fuchsia, scented geranium, coleus, or wax begonia. Stick 3- to 4-inch green stem cuttings in soil. Place pots in a shaded spot, and keep soil moist.

Make sure mower height is raised so you’re cutting grass higher. When grass is taller, it shades soil beneath, which reduces water evaporation from soil. Taller grass generally has deeper roots, which helps it withstand drought better.

September is peony planting time. That means August is the month to order peony roots. You should have peonies in the ground about a month before the average first frost date.

How to water plants in the Summer

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To prevent your plants hanging their heads in summer, they need plenty of water. But how much, how often, water from above or below? Here you find some smart and helpful facts for watering your plants.

Rule no. 1: Keep evenly moist

Most plants depend on even moisture. However, slight drying out before watering promotes root growth of the plants.

Rule no. 2: Water more seldom but then thoroughly

In the flower bed, one to two watering sessions per week are usually sufficient: better to water more seldom but with plenty of water rather than a little water often.

Rule no. 3: Water late in the evening or early in the morning

When you water cooled soil in the evening or night then less water evaporates than as on hot soil during the day. And the plants can sufficiently supply themselves with water before the next day’s heat.

Rule no. 4: Keep leaves dry

Wet leaves become diseased leaves. Kept wet overnight, leaf-mould diseases may result. Leaves that are made wet in the sun develop slight burn marks (burning glass effect of the water droplets).

Requirement-suited watering means that the water must sufficiently reach the roots. Too-low water quantities often only cover the upper soil centimetres – or don’t even reach them at all, e.g. when there is a mulch covering of the soil and too little irrigation. Requirement-suited watering also means that crop plants are particularly dependent upon evenly moist soil in the time until their crops are ripe for harvesting (examples: the forming of roots and corms [carrots, potatoes], leaves [basil, field salad], heads [cauliflower, lettuce], husks [beans] or fruit [tomatoes, fruit]).

Rule no. 5: Give the right water quantity

Rule no. 6: Give larger water quantities in parts

Water needs a moment to seep into the soil. Before precious water in the bed flows away unused, it’s better to water repeatedly in parts.

Rule no. 7: Water with a target but distribute

Always watering at only one root point leads to one-sided root growth and thereby to poorer nutrient absorption in the soil. Therefore, always water around the plant and distribute in the entire irrigation area.

Rule no. 8: Irrigate in a way that saves water

Water as much as necessary and as little as possible. This is simplified with an automatic irrigation system with moisture sensor – in the bed, on the balcony and on the lawn.

Rule no. 9: Avoid waterlogging

Waterlogging suppresses the breathing air of the roots out of the soil – the root cells drown without oxygen.

Rule no. 10: Use quality, clay-rich soil

Plant soil rich in clay minerals has better expanding properties and can therefore hold soil in the water better and in a more even way. In wet summers and in winter, ensure water drainage to prevent waterlogging.

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