11 Things to Do in August to Get Your Garden Ready for Fall

Updated: Sep. 30, 2021

Even in the coldest hardiness zones, August isn't yet the time to start putting your gardens to rest for the winter—it's still peak season after all and first frost is probably eight weeks away or more. But it isn't June either, and there are some things you can do to promote a healthy harvest and a successful fall garden.


Plant Fall Crops

August is a good month for planting Fall crops in your garden. In Zone 6 and warmer, you can still plant some substantial crops like beans, cauliflower, cucumber and squash. In Zone 5 and colder, your options are more limited but definitely worth doing: look at hardy, cold-tolerant greens like kale and chard, as well as some lettuces, spinach and Asian greens.
Here are 10 fast growing vegetables you can harvest quickly.


Plant Trees and Shrubs

Containers or burlap-ball shrubs and trees should go into the ground 4 to 6 weeks before first frost. In Northern gardens that means late August. This gives the plant a chance to establish itself before the onset of winter, but not to get so far along that it thinks a new growing season has begun.

Check out our guide to trouble-free tree planting.

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Divide Perennials

Perennials that flower in Spring will start to flag a bit in your garden by the end of August. To keep them healthy and ready to explode next spring, divide the roots as the plants die back and relocate them if you can.

Learn why fall is the perfect time to plant perennials

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Build a Cold Frame to Extend the Season

August is the time to start preparing to defend your garden against first frost. Build a cold frame (you can use it again in spring) or a hoop house or even tack some sheets of 3-mil plastic to some 2x4s to have at the ready so you don’t end up trying to drape old sheets over your garden as the sun sets.

Check out easy garden chores you should do in fall.

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Refresh Your Mulch

July and August take a toll on garden mulch—it washes away, fades out, or simply disappears into the undergrowth. Scatter a few bags now and your fall garden will look neater and be nestled in snugly for the coming winter.

Psst—fall leaves make great mulch for your lawn.

Fertilize lawn
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Fertilize for a Fantastic Finish

Depending on the crop, your plants and lawn have likely drawn all or most of the nutrition from your Spring fertilizing. August is a great time to re-up the amendments in your garden and yard. This is especially true if you are using organic fertilizers: it takes much longer for organic nutrients to break down and become available to plants.

Learn how to make a DIY compost bin.


Clean Up and Maintain Your Tools

Your garden and lawn tools have had a pretty good workout by now. August is a good time to give them some attention before the frenzy of harvesting hits. You’ll need to repeat the process before you put them to bed for the winter but it will be much easier if you’re not dealing with a whole season’s worth of wear and grime.

Learn how to choose and use the best garden tools.

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Cut Back Your Herbs

Parsley, cilantro, basil (shown here), dill and other cool-season herbs probably have bolted by August and are too bitter to consume. You can let them flower, which is a good idea because pollinators love herb flowers and the plants will self-seed later in Fall. Or, cut them back a couple of inches above ground and most should grow back for a fresh Fall crop.

These are the all-time best patio herbs to grow.


Order Fall-Planted Bulbs

August is too early to plant tulips (shown here), crocuses, hyacinth, garlic or any other Fall bulbs. But it is not too early to order them from your favorite gardening catalog. Most bulbs sell out as the late Fall planting season approaches, so order yours while the selection is best. Store in a cool, dry place until you are ready to plant them.

Take a look at our guide to planting spring-blooming bulbs.

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Prune Your Summer-Flowering Shrubs

By the end of August, your summer-flowering shrubs (hydrangea, mock orange, spirea) will be waning a bit, which makes it a good time to prune them. You can still identify any dead branches easily and you don’t need to worry (much) about damaging the plant.

Learn when to prune hydrangea shrubs for big summer blooms.

Shannon Kaszubowski/Shutterstock

Enjoy Your Gardens

You spend the whole summer with your face buried in tomato plants looking for aphids, or scanning for weeds, and it is easy to miss the big picture. Take some time to stroll through your gardens. Make notes: What worked and what didn’t? What should you do differently next year? Snap photos (or draw maps and make sketches, if you prefer), take note of plant varieties and where they are planted. You might think you’ll remember next Spring but don’t count on it. And, perhaps most importantly, enjoy your garden: this is why we do it!

Check out these tips to turn your garden from good to great..

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Originally Published on The Family Handyman