How to Plant Flowering Shrubs for the Best Results
Planting a flowering shrub may look simple enough. Dig a hole, add the plant, cover the roots, and give it some water.
Unfortunately, a few small mistakes on planting day can cause problems for years.
A shrub planted too deeply may struggle in wet soil. Circling roots may never spread properly. The wrong location can lead to weak flowering, scorched leaves, or constant pruning once the plant outgrows the space.
At Bobby & Lynn’s Plant Farm in Dallas, Georgia, we’ve learned that good planting begins before the shovel ever touches the ground. Choosing the right shrub for the sunlight, drainage, and available space is just as important as digging the hole correctly.
Quick Answer
To plant a flowering shrub successfully:
- Check the sunlight throughout the day.
- Confirm the shrub’s mature height and width.
- Test how quickly the planting area drains.
- Dig a hole wider than the root ball but no deeper.
- Loosen circling or tightly packed roots.
- Set the top of the root ball level with or slightly above the ground.
- Backfill mainly with the original soil.
- Water the complete root ball slowly and deeply.
- Apply two to three inches of mulch.
- Keep mulch away from the stems.
- Monitor the original root ball throughout the first growing season.
Proper planting gives the roots the best chance to move into the surrounding soil and support healthy growth for years.
Choose the Plant Before Digging the Hole
The prettiest shrub at the garden center is not always the best shrub for your yard.
Before buying, consider:
- Sunlight
- Mature size
- Soil drainage
- Water needs
- Cold hardiness
- Heat tolerance
- Blooming season
- Growth habit
- Deer pressure
- Maintenance needs
The goal is to choose a plant that naturally fits the location.
A shrub planted in suitable conditions usually needs less watering, less corrective pruning, and fewer rescue attempts later.
Check the Sunlight Carefully
Plant labels may say full sun, partial sun, or shade, but those descriptions can be misleading unless you know when the sunlight reaches the area.
Morning sun is much gentler than late-afternoon sun.
A bed receiving four hours of morning sunlight followed by afternoon shade may suit bigleaf hydrangeas, gardenias, and certain azaleas.
A location receiving six or more hours of direct sunlight may work better for:
- Panicle hydrangeas
- Butterfly bush
- Rose of Sharon
- Crape myrtle
- Spirea
- Vitex
Spend a day checking the planting area before choosing the shrub.
Pay attention to:
- When sunlight first reaches the bed
- When shade begins
- Whether the location faces east or west
- Heat reflecting from brick or pavement
- Seasonal shade from nearby trees
- Whether the site receives full summer sun
A location that looks shaded during spring may become much brighter after the sun shifts or nearby trees are pruned.
Our guide to the best shrubs for morning sun and shady afternoons can help with partially shaded planting areas.
For brighter locations, see Best Flowering Shrubs for Full-Sun Landscapes.
Plan for the Mature Size
One of the most common planting mistakes is spacing shrubs according to their nursery-pot size.
A young plant may look lonely in a large bed. That does not mean several more shrubs should be squeezed around it.
Check the expected mature height and width before planting.
Consider whether the mature shrub will:
- Block a window
- Cover a walkway
- Crowd a porch
- Grow against the house
- Interfere with an air-conditioning unit
- Compete with nearby shrubs
- Extend into a driveway
- Require constant trimming
A shrub expected to grow six feet wide may eventually extend about three feet from its center in every direction.
Choose a compact cultivar when the planting space is limited. That is usually easier than repeatedly cutting a large shrub back to fit a small area.
UGA Extension recommends selecting landscape plants according to their mature size and the purpose they will serve in the landscape.
Check the Drainage
Most flowering shrubs prefer soil that remains moist but drains after rain.
Before planting, inspect the area after a heavy storm.
Warning signs of poor drainage include:
- Standing water
- Soggy soil that remains wet for days
- Moss growing over bare soil
- Water collecting near a downspout
- A low spot in the landscape
- Existing plants declining from root problems
- A sour or swampy soil smell
You can also perform a simple drainage test.
Simple drainage test
- Dig a hole about 12 inches deep.
- Fill it completely with water.
- Allow the water to drain.
- Fill it again.
- Watch how long the second filling takes to disappear.
When water remains for a long time, the area may be unsuitable for shrubs that require good drainage.
Moving the planting location, raising the bed, or selecting a moisture-tolerant shrub may be better than trying to force the wrong plant into a wet area.
Drainage is especially important in Georgia’s heavier clay and clay-loam soils. Poor drainage can create conditions that encourage root decline and disease.
Consider a Soil Test
A soil test can reveal:
- Soil pH
- Phosphorus levels
- Potassium levels
- Calcium and magnesium levels
- Whether lime is needed
- Whether fertilizer is needed
Do not automatically add lime, sulfur, or fertilizer because someone else used it in their yard.
Different flowering shrubs prefer different soil conditions. Hydrangeas, azaleas, gardenias, and blueberries often prefer more acidic soil than many other landscape plants.
The University of Georgia Extension soil-testing guidance explains that a laboratory soil test can provide specific recommendations for the plants you intend to grow.
When Is the Best Time to Plant Flowering Shrubs?
Fall is often the easiest planting season in Georgia.
The cooler temperatures reduce stress while the roots begin growing into the surrounding soil. The plant can establish during fall, winter, and early spring before facing summer heat.
Early spring is another good option.
Summer planting is possible, but it requires much closer watering and monitoring. Newly planted shrubs can dry quickly during hot weather because their roots have not yet spread beyond the original nursery root ball.
Winter planting can also work when the soil is not frozen and the weather is suitable.
UGA Extension notes that trees and shrubs can be planted throughout the year in Georgia when proper planting and care are provided.
Prepare the Planting Area
Remove grass, weeds, landscape fabric, and thick layers of old mulch from the planting area.
Create a clear working space wider than the root ball.
Grass growing directly around a new shrub competes for water and nutrients. It also increases the chance of damage from lawn mowers and string trimmers.
Do not dig the hole until you have measured the actual root ball.
Nursery containers are not always filled to the top, so the pot’s height may not match the root ball’s depth.
Dig a Wide, Shallow Hole
The planting hole should be approximately two to three times wider than the root ball.
It should be no deeper than the root ball itself.
A wide hole loosens the surrounding soil and makes it easier for new roots to spread outward.
A deep hole can allow the shrub to settle below ground level.
Why planting depth matters
Roots need oxygen.
When a shrub is planted too deeply:
- Water may collect over the root system.
- The lower stems may remain wet.
- Roots may receive less oxygen.
- Bark may begin to decay.
- Growth may become weak.
- The plant may decline slowly over several years.
The top of the root ball should remain level with or slightly above the surrounding ground.
Planting slightly high is often helpful in heavy clay.
Remove the Shrub From Its Container
Turn the container on its side and slide the root ball out carefully.
Avoid pulling the plant by its trunk or stems.
When the container does not release easily:
- Tap the sides.
- Roll the pot gently.
- Squeeze a flexible nursery container.
- Cut the container away when necessary.
Once the plant is removed, inspect the roots before placing it in the hole.
Loosen Circling Roots
Container-grown shrubs may develop roots that circle around the inside of the pot.
When those roots are left tightly wrapped, they may continue circling instead of moving outward into the surrounding soil.
Gently loosen the outer roots with your fingers.
For heavily root-bound plants:
- Tease apart the outside layer.
- Pull several roots outward.
- Make a few shallow vertical cuts if necessary.
- Remove roots that are clearly dead or damaged.
- Avoid tearing the entire root ball apart.
The goal is to redirect the roots without causing unnecessary damage.
A healthy root system should eventually grow beyond the shape of the nursery container.
Find the Top of the Root Ball
Do not assume the top layer of potting mix marks the correct planting depth.
Sometimes loose soil has been added over the original root system.
Gently brush away the upper potting mix until you find the area where the main stems or trunk meet the roots.
That root flare or upper root area should remain visible and should not be buried beneath several inches of soil.
This is especially important with larger shrubs and tree-form plants.
Set the Shrub in the Hole
Place the shrub in the center of the hole.
Check the depth before adding soil.
The top of the root ball should be:
- Level with the surrounding ground in well-drained soil
- Slightly above ground level in heavy clay
- High enough that settling will not bury the stems
Lay the shovel handle or a straight board across the planting hole to compare the root-ball height with the surrounding soil.
Step back and look at the plant from several directions.
Make sure the best side faces the area from which it will be seen most often.
This is also the time to straighten the plant. Correcting a leaning shrub becomes harder after the hole is filled.
Backfill With the Original Soil
Use mainly the soil removed from the planting hole.
Break apart large clods and place the soil gently around the root ball.
UGA Extension recommends backfilling individual tree and shrub planting holes with the same soil removed from the hole rather than creating a pocket filled entirely with different soil.
Why not fill the hole with potting soil?
A hole filled with loose, rich soil may behave differently from the surrounding clay.
The planting hole can act like a container or bowl. Water may collect around the roots instead of moving into the surrounding ground.
Roots may also remain inside the amended pocket instead of spreading outward.
This does not mean organic matter is never useful. Compost and other materials can improve an entire planting bed over time. The problem is creating one small pocket that is drastically different from the surrounding soil.
Do not place fresh manure, concentrated fertilizer, or potting soil directly against the root ball. UGA Extension specifically cautions against putting those materials directly into the planting hole.
Firm the Soil Gently
Use your hands to settle the backfill around the root ball.
Do not stomp heavily on the soil.
Heavy pressure can compact the soil and reduce the spaces that hold oxygen and water.
Watering after planting will help settle the soil naturally.
When the soil sinks, add a little more without covering the top of the root ball.
Water Thoroughly After Planting
Water the shrub slowly and deeply immediately after planting.
The first watering should:
- Moisten the entire root ball
- Settle loose soil
- Remove large air pockets
- Help roots make contact with the surrounding soil
Do not splash a small amount of water over the surface and assume the job is complete.
Apply water near the root ball and allow it to soak down gradually.
After several minutes, check whether the center of the root ball is actually moist.
Watch the Original Root Ball
This is one of the most important parts of caring for a newly planted shrub.
The nursery potting mix may dry at a different rate from the surrounding Georgia soil.
The surrounding clay may feel damp while the original root ball is dry.
The opposite may also happen. The planting area may remain saturated even though the soil surface appears dry.
Check both the root ball and nearby ground before watering.
At Bobby & Lynn’s Plant Farm, this is one of the first things we check when a newly planted shrub begins wilting.
A gardener may have watered the flower bed, but the water ran around the root ball instead of soaking through it.
How Often Should a New Shrub Be Watered?
There is no single schedule that works for every shrub and every yard.
Watering frequency depends on:
- Temperature
- Rainfall
- Wind
- Sunlight
- Soil type
- Root-ball size
- Plant size
- Drainage
- Mulch
- Time since planting
During the first few weeks, check the root ball frequently.
Water when it begins to dry several inches below the surface.
The goal is to keep the roots evenly moist without leaving them constantly saturated.
Deep watering is generally better than frequent light sprinkling.
A shrub planted during cool fall weather may need less frequent watering than one planted during a hot, windy week in June.
Do Not Rely Only on Rainfall
A brief rain shower may wet the leaves and top layer of soil without soaking the root ball.
After rain:
- Wait for the water to settle.
- Check beneath the mulch.
- Feel the soil inside the original root ball.
- Water when the root ball remains dry.
Newly planted shrubs need moisture where their roots currently exist, not only several feet away in the flower bed.
Add Mulch Properly
Apply two to three inches of organic mulch around the root area.
Good mulch options include:
- Pine straw
- Shredded bark
- Wood chips
- Aged leaf mulch
Mulch helps:
- Slow moisture loss
- Keep the soil cooler
- Reduce weeds
- Protect shallow roots
- Limit grass competition
- Prevent mower damage
- Improve the soil as it breaks down
Keep mulch several inches away from the stems or trunk.
Do not pile mulch into a tall mound against the plant.
UGA guidance commonly recommends maintaining a two- to three-inch mulch layer around landscape trees and shrubs to conserve soil moisture.
Should You Fertilize a Newly Planted Shrub?
Usually, heavy fertilizer is unnecessary at planting time.
New roots need time to recover and begin growing into the surrounding soil.
Fertilizer may stimulate tender top growth before the root system is ready to support it.
Do not place concentrated fertilizer directly in the planting hole.
When fertilizer is needed, base the decision on:
- A soil test
- The plant’s needs
- Product-label directions
- The season
- The health of the shrub
Healthy root establishment is more important than immediate fast growth.
Should You Prune a Shrub When Planting?
Remove branches that are:
- Broken
- Dead
- Diseased
- Badly damaged
- Torn during transport
Avoid heavy shaping immediately after planting.
The leaves help the plant produce energy while the root system becomes established.
Major pruning can also remove flower buds, especially on shrubs that bloom on old wood.
Wait until the appropriate pruning season unless there is an immediate structural problem.
Do Newly Planted Shrubs Need Stakes?
Most ordinary flowering shrubs do not need staking.
Staking may be helpful when:
- The plant is tree-form.
- The root ball moves in strong wind.
- The trunk cannot remain upright.
- The site is exposed.
- The plant is top-heavy.
Use soft ties and allow a little movement.
Check the ties regularly so they do not cut into the bark.
Remove the support once the roots can hold the plant securely.
Common Flowering-Shrub Planting Mistakes
Planting too deeply
The top of the root ball disappears beneath several inches of soil or mulch.
This can reduce oxygen and keep the lower stems too wet.
Digging a narrow hole
Roots have difficulty moving into compacted soil surrounding the original container shape.
Make the hole wider, not deeper.
Filling the hole with potting soil
A soft pocket surrounded by clay can hold too much water and discourage roots from spreading.
Leaving circling roots untouched
Root-bound plants may continue growing in a circular pattern.
Loosen the outer roots before planting.
Ignoring mature size
A shrub that looks small today may block a window or walkway in a few years.
Watering only the soil surface
The leaves may receive a shower while the root ball remains dry.
Watering every day without checking
Heavy clay may remain saturated long after the surface appears dry.
Piling mulch against the stems
Constant moisture around the bark can contribute to decay.
Fertilizing heavily at planting
Fast top growth can place additional demand on a small or damaged root system.
Planting beside aggressive tree roots
Large trees may take much of the available moisture before the new shrub can become established.
What We See Most Often at Our Plant Farm
The planting problem we see most often is not always a lack of water.
Sometimes the shrub is watered frequently, but the moisture never reaches the original root ball. Other times, the surrounding clay stays wet and the plant receives even more water because the wilted leaves look thirsty.
Both situations can produce a struggling shrub.
We also see plants installed too deeply because people want the top of the potting mix hidden beneath the soil.
The upper root area should remain near the surface. Burying it does not help the plant feel more secure.
Another common problem is planting according to the shrub’s current size.
A small hydrangea or Rose of Sharon may look lost several feet away from the house. A few years later, that same shrub may be pressed against the siding and covering half the window.
Plant for what the shrub will become, not what it looks like today.
First-Year Care After Planting
During the first year:
- Check the root ball regularly.
- Water deeply when needed.
- Keep the mulch layer maintained.
- Remove weeds and grass.
- Watch for pest or disease problems.
- Avoid heavy fertilizer.
- Protect the plant from mower damage.
- Correct leaning before roots become established.
- Monitor drainage after storms.
- Avoid unnecessary transplanting.
Some shrubs establish quickly. Others may need a full growing season or longer before their roots spread widely.
A slower first year does not always indicate failure.
Newly Planted Shrub Checklist
Before planting:
- Have I watched the sunlight throughout the day?
- Do I know the shrub’s mature height and width?
- Is the variety suited to Georgia?
- Does the area drain after rain?
- Have I checked for buried utilities?
- Is there enough room from the house and walkways?
- Could nearby trees compete for moisture?
- Do I have a way to water during establishment?
During planting:
- Is the hole wider than the root ball?
- Is the hole no deeper than the root ball?
- Have I loosened circling roots?
- Is the upper root area visible?
- Is the shrub straight?
- Am I using mainly the original soil?
- Is the top of the root ball level or slightly high?
- Have I watered the complete root ball?
- Is the mulch away from the stems?
After planting:
- Am I checking both the root ball and nearby soil?
- Is the soil moist but not constantly saturated?
- Has the plant settled below ground level?
- Is mulch still the proper depth?
- Are grass and weeds competing with the plant?
- Is the shrub showing signs of sun or heat stress?
Frequently Asked Questions
How deep should a flowering shrub be planted?
Plant it so the top of the root ball is level with or slightly above the surrounding ground.
Avoid burying the main stems or trunk.
How wide should the planting hole be?
Dig the hole about two to three times wider than the root ball.
The extra width helps roots move into the surrounding soil.
Should compost be added to the planting hole?
Avoid filling a single planting hole with large amounts of compost or potting soil, especially in clay.
Use mainly the original soil for backfilling. Organic matter can be incorporated more broadly when preparing an entire bed.
Should fertilizer go into the planting hole?
No concentrated fertilizer should touch the roots.
Wait until the shrub begins establishing, and use soil-test recommendations and label instructions.
How often should a newly planted shrub be watered?
Check the root ball frequently and water when it begins to dry.
The exact frequency depends on weather, soil, plant size, sunlight, drainage, and season.
Can flowering shrubs be planted in summer?
Yes, but summer-planted shrubs require closer monitoring.
The root ball can dry quickly during Georgia heat.
Is fall a good time to plant flowering shrubs?
Yes. Fall is often one of the best planting seasons in Georgia because cooler temperatures reduce stress while roots begin establishing.
Should the root ball be broken apart?
Loosen tightly circling outer roots.
Do not destroy a healthy root ball unnecessarily, but redirect roots that are wrapped around the container.
Can flowering shrubs grow in Georgia clay?
Many can.
Proper planting depth, wide holes, good drainage, and careful watering are especially important in clay soil.
Why is my newly planted shrub wilting?
Possible causes include:
- A dry root ball
- Excessively wet soil
- Transplant shock
- Hot afternoon sun
- Damaged roots
- Wind
- Planting too deeply
- Poor drainage
Check the soil before automatically adding more water.
What to Do Next
Start by studying the planting location.
Check the sunlight, drainage, mature space, and nearby competition before choosing a flowering shrub.
Once you have the right plant, dig a wide and shallow hole. Loosen circling roots, keep the top of the root ball near ground level, and backfill mainly with the original soil.
Water the complete root ball slowly. Add a wide mulch ring without piling mulch against the stems.
During the first growing season, check the original root ball instead of assuming rainfall or surface watering reached the roots.
A properly planted shrub has a much better chance of becoming healthy, full, and covered with flowers.
Browse our Plant Directory to compare mature size, sunlight, bloom time, and care needs before choosing your next shrub.
You can also explore Plants We Grow to see flowering shrubs we enjoy growing at Bobby & Lynn’s Plant Farm.
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