Landscaping services
Landscape installation: soil, water and one cold night
What the hardiness zone does and does not tell you, how a bed should be prepared, the mulch depth to write down, and what to ask.
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Written by HyreYard Research Desk Primary-source research and fact checking
The short answer
New plants that die in a bed are often killed by the hole, the drainage under it, the watering in the first two summers, or mulch piled against the stem.
A planting quote that names the soil preparation, the drainage, the mulch depth and who waters during establishment describes what decides the outcome. A plant list and a price does not.
What should you know before planting a new bed?
A plant list, a “zone 6” rule of thumb or a planting date written against the old map may be wrong now. Look up your zip code before buying anything marginal.
Penn State Extension sets the depth at 2 to 4 inches and warns that deeper, “air may not penetrate the mulch layer and the underlying soil becomes depleted of oxygen.”
The Web Soil Survey gives the mapped soil, drainage class and shrink-swell rating for your lot.
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What does a bed that is going to fail look like?
Planting failures are slow and often visible before the plant dies. Look for these in your own beds and in photos of a company’s finished work.
The hole is a bucket in soil that will not drain.
A healthy nursery tree can decline for years before anyone blames the mulch.
An edge is either cut and kept up, or it disappears. That is an ongoing cost.
Full on handover day, a thicket needing thinning a few years later.
No air, no room to maintain, and branches growing into siding.
Or the reverse. Watch your yard across one day before anyone plants.
A year on, circling roots were never teased out, or the hole was glazed in clay.
Shrubs watered on a turf schedule can drown.
What does the hardiness zone tell you, and what not?
The zone answers one question. Many reasons a plant fails in your yard are in the rows below it, and none is on the map.
| Question | What the map says |
|---|---|
| What the zone is | The average coldest winter night of the year. Nothing about summer heat, humidity, rain, soil or how long winter lasts. |
| What changed in 2023 | The revision used 13,412 stations over 1991 to 2020, against 7,983 before. A half zone is 5°F. |
| Is it climate data? | The developers cautioned against treating the changes as a reliable indicator of global climate change, because they also reflect more sophisticated mapping methods, many more weather stations, and the inherently variable nature of extreme minimum temperatures. |
| Summer heat | Not on the map. A plant hardy for your winter can still suffer through long hot nights. |
| Rain and humidity | Not on the map. Two places in one zone can get very different rainfall. |
| Soil | Not on the map, and unlike the zone you can change it. Look your lot up on the Web Soil Survey. |
| Your microclimates | Not on the map. A south wall, a frost pocket at the foot of a slope and a windy corner can differ within one yard. |
What should a company check before proposing plants?
A plant list written before anyone looked at the soil or the light is a catalog, not a proposal.
Morning and afternoon sun are different exposures, and “part shade” on a label does not say which.
The mapped soil, plus a test hole filled with water to see what that bed actually does.
A bed at the foot of a slope needs a different plan from one at the top.
Planting under a mature tree means competing for water, and not cutting roots to make the bed.
Whether the bed sits on a zone designed for turf.
Height under windows and depth against the wall, at full size.
A bed for someone in it weekly differs from one for someone who will not be. Both are fair briefs.
Deer and rabbits, and any HOA rules. See HOA landscaping rules.
How is a garden bed planted?
Most of the value in a planting job is created before any plant leaves its pot.
Mark the bed and live with the shape for a day. Then cut the edge. A cut, steel or stone edge each carries its own upkeep.
Grass and perennial weeds come out of the footprint. Turf tilled into a bed can regrow through it.
Organic matter mixed across the bed, not dumped in each hole. An amended hole acts like a pot the roots circle inside.
If water stands in a test hole, that is a drainage job. See drainage and grading.
Place plants across the bed and look from the house and the street. Space to mature size, which looks sparse at first.
Holes wider than the root ball and no deeper. Tease out circling roots, and set the root flare at or just above grade.
A thorough soak to settle the soil, then a written watering plan for the first two seasons.
Penn State Extension: “Apply a 2- to 4-inch layer of organic mulch and no more; use less if the soil is poorly drained.” Keep it clear of every stem and trunk.
How deep should mulch go?
These are Penn State Extension’s numbers. Put them in the contract.
| Mulch | Penn State Extension |
|---|---|
| Standard organic mulch | “Apply a 2- to 4-inch layer of organic mulch and no more; use less if the soil is poorly drained.” |
| Fine or double-shredded | “If using finely textured or double-shredded mulch, use 1 to 2 inches since these materials allow less oxygen through to the root zone.” |
| Clear of a young trunk | 3 to 5 inches, with the flare, where the trunk widens into roots, left visible. |
| Clear of a mature trunk | 8 to 10 inches. |
| Topping up | Depth is what is there in total. Rake back, measure, then add only the difference. |
At the right depth, mulch conserves soil moisture by increasing infiltration and slowing evaporation, moderates soil temperature at the roots, and impedes competing weeds and grass.
What belongs in a planting scope?
These lines decide how the bed looks in year three. They are easy to ask for now and awkward to add later.
Botanical names and sizes, not just “maple” or “juniper.”
Spacing stated to mature size.
What is mixed in, at what rate, across the whole bed.
What was found and what is being done. If nothing, the scope says so.
Type and depth as a number: 2 to 4 inches, or 1 to 2 for fine material, clear of stems.
Edge type and who maintains it, and which zone waters the bed.
Who waters, how often, for how long, and whether it is in the price.
Length, what voids it, and whether a replacement is supplied or installed. See plant warranties.
Planting failures are slow, partial and easy to blame on weather. A scope that fixes soil, mulch, watering and warranty terms in advance keeps a conversation in month eight factual.
What moves the price of a planting job?
Planting is priced on the plants, the ground they go into, and how far both must be carried.
| Factor | Why it changes the number |
|---|---|
| Plant size | The same plant at three sizes is three prices. A smaller plant can establish faster than a large one recovering from transplant. |
| Count and spacing | Spacing to mature size uses fewer plants. Instant fullness means removals later. |
| Availability | What local nurseries grow in quantity costs less than what a specialist must source. |
| Bed preparation | Removing turf and weeds and mixing in organic matter is real labor and material, and it decides the outcome. |
| Soil and drainage | Compacted, rocky or clay ground changes the digging. If water stands, the bid should fix it or exclude it by name. |
| Access | A back yard with no side access is a different labor line from a front bed by the drive. |
| Establishment watering | If the company waters through the first season, that is scheduled labor, priced as such. |
HyreYard publishes no national average price for this work. Regional labor, material and disposal rates, access and soil move it far enough that a single figure would mislead.
Check your zone before you buy anything marginal.
USDA released the revised map on 15 November 2023, and about half the country moved a half zone warmer.
A plant list or rule of thumb older than that was written against a different map.
Keep its limit in view: it is one number about one cold night, not a verdict on whether a plant will thrive in your yard.
What to ask before you approve a planting plan
From the 2023 map?
And what are you mixing into the whole bed?
What does this price do about it?
Mature size, or handover-day fullness?
And will it stay clear of stems and trunks?
Was it designed for turf?
How often, and is it in this price?
And is a replacement installed or only supplied?
What to do before anyone visits
On the current USDA map. It changed on 15 November 2023.
About a foot deep. Fill it, let it drain, fill it again and time it. Water there hours later is the key finding.
Morning, midday and late afternoon on one day. Memory overstates sun.
Where snow piles, where road salt lands and where wind funnels. The zone ignores all three.
Which planting mistakes kill plants slowly?
Mulch piled against a trunk keeps bark damp and hides rodents. Keep it 3 to 5 inches off a young trunk and 8 to 10 off a mature one.
Two inches added each spring onto three already there becomes a lid nobody decided to build.
A root flare set below grade in heavy soil keeps the stem in damp ground, and the decline is slow.
Rich soil in a pocket of clay acts like a pot. Roots circle inside it, and in wet weather it fills.
Lawns and beds want different water. A bed on a lawn schedule can drown in a pattern that looks like disease.
The first two summers decide establishment. If no one is named, no one waters.
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Questions
Did my hardiness zone change?
Does a warmer zone mean the climate is warming here?
What does the hardiness zone actually tell me?
How deep should mulch be?
Should I replace the soil in a new bed?
How long does a new planting need watering?
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HyreYard Research Desk
Primary-source research, data analysis and fact checking
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This page explains the work so you can read a proposal and judge the company that wrote it.