It is often said that the best weather in the Pacific Northwest is from August into October. Typically, this is the driest and the warmest time in our area. In August, late-ripening fruits and vegetables and other late-blooming annuals, perennials, and shrubs come into their own. It is also a great time to enjoy all the hard work you have put in this season. But there are also a few chores that need to be done this month to keep your garden in top shape for the rest of the summer and into fall.

Collect seed. Many gardeners love to collect their own flower seeds during this time of year. With so many more people gardening for the first time this year, obtaining seeds from local nurseries, garden centers, and online sources has been challenging. Collecting seed is a great way to make more plants inexpensively and to grow more plants that you love. You can also create a seed-swap program with your fellow gardeners to experiment with new plants. I like to evaluate which varieties thrive in my garden and then collect seed from those grasses, perennials, and annuals. Collecting seed lets me reseed exactly where I want the plants to grow and experiment with different growing conditions.

Thoroughly water new additions. Make sure to thoroughly water newly planted additions to your garden. Trees, shrubs, and perennials can be expensive. Watering them well is the best way to ensure they survive. Make sure they are getting deep and thorough watering in August and into fall when the rains come again in the Northwest. If new additions do die, finding the same plants midsummer is a difficult chore; they may have to be purchased the next season. This will leave large gaps in your gardening scheme. Deep watering and making sure new plants have plenty of moisture-retaining mulch will help their odds of survival.

Do some light pruning of ornamental trees and shrubs. August is a great time for light pruning of some ornamental trees and shrubs. This time of year, many trees, especially maples (Acer spp. and cvs., Zones 3–9), will go summer-dormant and the sap will stop flowing, allowing for light pruning. I would not do major renovation pruning now, as it would most likely kill your tree or shrub. But it is a good time to prune to create space for light and air in the canopies. You can also remove branches that are at face level to prevent scratched faces or poked eyes, those that interfere with movement in pathways and patios, or those that are visually dead or diseased. Just remember to clean your tools!

Clean your water features. We all love birdsong and the little feathered friends that water features and birdbaths attract to our gardens. During the hot summer months, make sure to clean, rinse, and refill your water features. Standing water can allow mosquitoes to breed, which if continued unchecked can turn your garden into a nightmare. I regularly check my workspace for empty pots and containers for standing water, and I empty them to prevent creating the perfect breeding ground for those pests.

Deadhead summer-blooming annuals and perennials. To keep your summer-blooming flowers in top shape, you need to maintain them with frequent deadheading. This chore does take some time, but it will result in continuous flowers all summer long. I prefer to use a fruit-pruning tool or pair of sharp garden scissors to do this job. As I always say, clean your tools regularly with a diluted bleach solution or rubbing alcohol between plants to prevent spreading diseases among your plants. Dahlias (Dahlia spp. and cvs., Zones 7–11), chocolate cosmos (Cosmos atrosanguineus, Zones 7–9), and dianthus (Dianthus spp. and cvs., Zones 4–8) are just a few examples of plants that need consistent deadheading to keep blooming all summer long.

Reinvigorate your soil with cover crops. With so many of us growing our own fruit and vegetables this year, using cover crops or green fertilizer is a great way to supplement your garden soil with added nutrients and help prevent soil loss. There are many types of plants you can grow to help improve your soil. Since most of us are not large-scale farmers, I would avoid a monoculture cover crop but instead use a mix from your favorite seed supplier. Botanical Interests, Renee’s Garden, and Johnny’s Seeds are a few of the sources I have purchased cover-crop seed mixes from to use in my own garden for green fertilizer, all with equal success. You can let them grow and turn them under for fall crop planting, or leave them in the bed or garden until spring for spring planting. Learn more about sowing cover crops here.

Taking care of your garden year-round in little bits and pieces makes maintenance manageable and less strenuous. It also leaves time to enjoy the garden you have created. I wish you great success with tackling these chores and others this August.

—Jason Jorgensen is a landscape designer in Seattle.

Fine Gardening Recommended Products

Spearhead Shade Gardening Shovel with Steel-Reinforced Fiberglass Handle

Fine Gardening receives a commission for items purchased through links on this site, including Amazon Associates and other affiliate advertising programs.

Reduce Digging Effort - The Spear Head Spade is the first hybrid shovel/spade, guaranteed to make your toughest digging up to 80% easier than regular shovels and spades, even in the toughest soil conditions. Ideal for landscaping and gardening. Multi-Purpose Shovel - Spear Head Spade is a versatile tool that can be used for digging, planting, weeding, cutting, and edging. It is designed to handle tough soil and clay conditions, and can cut through roots and tough vegetation with ease. Innovative Design - Has a unique blade design that makes it more efficient and easier to use than traditional spades. The blade is shaped like a spearhead, with a pointed tip and a curved edge that allows it to penetrate the soil more easily. Ergonomic D-Handle - The large, cushioned D-grip offers comfort and better leverage for gloved and ungloved hands alike, reducing strain on the hands and wrists. Lightweight & Strong - Durable handle is made of special steel-reinforced, pultruded fiberglass to withstand heavy use. 60% stronger than EN-3388 shovel/spade standards, 33% thicker and 25% harder than normal shovels. Sharpened from tip to tail at a 35 degree angle for an effective and durable edge.

Buy at Amazon

Fiskars 7.9-12ft Extendable 2-in-1 Pole Tree Trimmer & Pruner with Rotating Head and Precision-Ground Steel Saw Blade

Fine Gardening receives a commission for items purchased through links on this site, including Amazon Associates and other affiliate advertising programs.

IDEAL BRANCH TRIMMER: Tree pruner that extends from 7.9 to 12 feet; Lightweight aluminum pole weighing less than five pounds to help minimize fatigue; Ideal for cutting high branches, or making low cuts without bending or kneeling. MAXIMUM POWER AND PRECISION: Fiskars Tree Pruner with Low-friction coating helps to prevent gumming up with sap or debris; Chain-drive gearing mechanism that provides 3X more power; Secure double locking system ensures extended pole stays put. LONG-LASTING AND RELIABLE: Extendable tree pruner with steel blades stay sharp through heavy use and provide excellent durability for lasting value; Fiskars pruning saws for tree trimming are built to last. QUALITY GARDEN TOOLS: From tree pruners to garden shears to Tree Loppers, Fiskars garden and yard tools are equipped with smart technologies and award-winning, ergonomic features INCLUDES: 1 Fiskars Extendable Tree Pruner with 15-Inch Double-Grind Saw (item 92406935K); Full lifetime warranty.

Buy at Amazon

Long Handle EZ-Digger

Fine Gardening receives a commission for items purchased through links on this site, including Amazon Associates and other affiliate advertising programs.

An excellent tool for use in any vegetable or flower garden. Has a 54" long hardwood handle. Hand-forged 7" tapered, curved blade. This is a spade, trowel, weeder, cultivator, and more.

Buy at Amazon