The bed under the maple

What grows here?

Not full sun or shade. How much usable light actually arrives across a day, when it arrives, and whether the spot ever dries.

What this spot actually is

Bundled plant catalogue

About 20.5 moles of usable light a day with about 7.5 hours of direct sun in high summer. That is part sun, whatever the label on the plant says.

Of the groups in the reference set, moisture-loving marginal is the one that actually belongs in conditions like these. Anything planted here sits wet for 10 months of the year, so drainage is the decision before the plant is.

Growing-season light

20.5

mol/m²/day

April to September, averaged

Midsummer direct sun

7.5

hours

On 15 July, traced against the plan

Freeze-thaw

89

cycles a year

What cracks pots, not what kills plants

Light through the year

MonthLightDirect sunDries inReads as
Jan8.99.5 hnot that dayshade
Feb1410.5 hnot that daypart shade
Mar2012 hnot that daypart sun
Apr26.213 h12.5 hpart sun
May25.714.5 h11.1 hpart sun
Jun19.17 hnot that daypart sun
Jul18.87.5 hnot that daypart sun
Aug17.68 hnot that daypart shade
Sep16.28.5 hnot that daypart shade
Oct14.911.5 hnot that daypart shade
Nov109.5 hnot that dayshade
Dec7.39 hnot that dayshade

Screening

Narrow upright evergreen screen

wrong place

The classic answer to a sightline when there is no room for a hedge.

  • Moisture: This spot sits wetter than this group tolerates. Wet feet kill far more plants than cold does.
  • Light: About 20.5 moles a day, against an ideal of 22. This is the right light band.
  • Reflected heat: Surface heat here is not the limiting factor.
This spot stays wet well past what this group survives in winter.

Watch for: Narrow forms lose their shape if the top is ever cut. Buy the mature height you want.

Examples, not recommendations: Columnar hornbeam; Italian cypress in mild dry climates; Upright yew in cool climates. What is right here is a question for a nursery that can see the site.

Broad evergreen hedge

wrong place

Dense all year, and it wants more width than people allow for.

  • Moisture: This spot sits wetter than this group tolerates. Wet feet kill far more plants than cold does.
  • Light: About 20.5 moles a day, against an ideal of 24. This is the right light band.
  • Reflected heat: Surface heat here is not the limiting factor.
This spot stays wet well past what this group survives in winter.

Watch for: A hedge kept below its natural width thins at the base, which is exactly where a seated sightline runs.

Examples, not recommendations: Yew; Portuguese laurel; Holly. What is right here is a question for a nursery that can see the site.

Deciduous hedge that holds its leaves

wrong place

Screens in summer, filters in winter, and holds brown leaves through the cold.

  • Moisture: This spot sits wetter than this group tolerates. Wet feet kill far more plants than cold does.
  • Light: About 20.5 moles a day, against an ideal of 26. This is the right light band.
  • Reflected heat: Surface heat here is not the limiting factor.
This spot stays wet well past what this group survives in winter.

Watch for: Winter screening is partial. If the problem is a winter sightline, this is not the answer.

Examples, not recommendations: Beech; Hornbeam. What is right here is a question for a nursery that can see the site.

Salt-tolerant coastal shrub

wrong place

Salt air is a different problem from wind, and this is the group that solves both.

  • Moisture: This spot sits wetter than this group tolerates. Wet feet kill far more plants than cold does.
  • Hardiness: Zone 6.6 is outside this group's usual range of 7 to 10. Hardiness is a floor, not a plan.
  • Light: About 20.5 moles a day, against an ideal of 30. This is the right light band.
This spot stays wet well past what this group survives in winter.

Watch for: Salt tolerance is specific. A plant that shrugs off wind inland can still burn in a coastal gale.

Examples, not recommendations: Escallonia; Griselinia; Elaeagnus. What is right here is a question for a nursery that can see the site.

Shade

Medium deciduous shade tree

wrong place

Summer shade that gives the winter sun back. The best shade device there is, and the slowest.

  • Moisture: This spot sits wetter than this group tolerates. Wet feet kill far more plants than cold does.
  • Light: About 20.5 moles a day, against an ideal of 30. This is the right light band.
  • Reflected heat: Surface heat here is not the limiting factor.
This spot stays wet well past what this group survives in winter.

Watch for: Mature spread is the number that matters, and it is almost always larger than the space allowed.

Examples, not recommendations: Field maple; Serviceberry; Hop hornbeam. What is right here is a question for a nursery that can see the site.

Deciduous climber for seasonal shade

wrong place

Shade over a pergola in July and bare timber in January, which is usually exactly right.

  • Moisture: This spot sits wetter than this group tolerates. Wet feet kill far more plants than cold does.
  • Light: About 20.5 moles a day, against an ideal of 30. This is the right light band.
  • Reflected heat: Surface heat here is not the limiting factor.
This spot stays wet well past what this group survives in winter.

Watch for: Wisteria in particular puts real load on a structure. Build for it before planting it.

Examples, not recommendations: Grape vine; Wisteria, given the structure for it; Virginia creeper. What is right here is a question for a nursery that can see the site.

Structure

Moisture-loving marginal

belongs here

For the corner that never dries, which most planting advice treats as a fault to fix.

  • Light: About 20.5 moles a day, against an ideal of 24. This is the right light band.
  • Moisture: Moisture here sits inside what this group will accept.
  • Reflected heat: Surface heat here is not the limiting factor.

Watch for: These want consistent moisture, not stagnant water. Standing water still needs solving.

Examples, not recommendations: Astilbe; Ligularia; Iris sibirica. What is right here is a question for a nursery that can see the site.

Fern for cool damp shade

will work

The plant group that genuinely wants the conditions people apologise for.

  • Light: About 20.5 moles a day is well past the 18 this group tolerates. Expect scorch and bolting rather than slow decline.
  • Moisture: This spot sits wetter than this group tolerates. Wet feet kill far more plants than cold does.
  • Reflected heat: Surfaces here reach about 116°F. A container in that is a watering commitment, not a planting decision.

Watch for: Ferns burn in reflected heat off a pale wall even in a spot with very little direct sun.

Examples, not recommendations: Dryopteris; Polystichum; Athyrium. What is right here is a question for a nursery that can see the site.

Narrow upright evergreen screen

wrong place

The classic answer to a sightline when there is no room for a hedge.

  • Moisture: This spot sits wetter than this group tolerates. Wet feet kill far more plants than cold does.
  • Light: About 20.5 moles a day, against an ideal of 22. This is the right light band.
  • Reflected heat: Surface heat here is not the limiting factor.
This spot stays wet well past what this group survives in winter.

Watch for: Narrow forms lose their shape if the top is ever cut. Buy the mature height you want.

Examples, not recommendations: Columnar hornbeam; Italian cypress in mild dry climates; Upright yew in cool climates. What is right here is a question for a nursery that can see the site.

Medium deciduous shade tree

wrong place

Summer shade that gives the winter sun back. The best shade device there is, and the slowest.

  • Moisture: This spot sits wetter than this group tolerates. Wet feet kill far more plants than cold does.
  • Light: About 20.5 moles a day, against an ideal of 30. This is the right light band.
  • Reflected heat: Surface heat here is not the limiting factor.
This spot stays wet well past what this group survives in winter.

Watch for: Mature spread is the number that matters, and it is almost always larger than the space allowed.

Examples, not recommendations: Field maple; Serviceberry; Hop hornbeam. What is right here is a question for a nursery that can see the site.

Ground cover

Rain garden and swale planting

belongs here

For ground that floods and then dries hard, which is a different problem from ground that is simply wet.

  • Light: About 20.5 moles a day, against an ideal of 26. This is the right light band.
  • Moisture: Moisture here sits inside what this group will accept.
  • Reflected heat: Surface heat here is not the limiting factor.

Watch for: The cycle is the point. Anything that only tolerates constant wet dies in the August between floods.

Examples, not recommendations: Iris in damp ground; Switchgrass; Joe Pye weed in North America. What is right here is a question for a nursery that can see the site.

Fern for cool damp shade

will work

The plant group that genuinely wants the conditions people apologise for.

  • Light: About 20.5 moles a day is well past the 18 this group tolerates. Expect scorch and bolting rather than slow decline.
  • Moisture: This spot sits wetter than this group tolerates. Wet feet kill far more plants than cold does.
  • Reflected heat: Surfaces here reach about 116°F. A container in that is a watering commitment, not a planting decision.

Watch for: Ferns burn in reflected heat off a pale wall even in a spot with very little direct sun.

Examples, not recommendations: Dryopteris; Polystichum; Athyrium. What is right here is a question for a nursery that can see the site.

Deep-shade foliage plant

wrong place

For the places that genuinely never see the sun, where most 'shade' plants still fail.

  • Light: About 20.5 moles a day is well past the 14 this group tolerates. Expect scorch and bolting rather than slow decline.
  • Moisture: This spot sits wetter than this group tolerates. Wet feet kill far more plants than cold does.
  • Reflected heat: Surfaces here reach about 116°F. A container in that is a watering commitment, not a planting decision.
This group is built for shade and this spot gives it about 20.5 moles a day. It will scorch.

Watch for: True deep shade is under three moles a day. Most plants sold as shade-tolerant want double that.

Examples, not recommendations: Hart's tongue fern; Epimedium; Asarum. What is right here is a question for a nursery that can see the site.

Part-shade perennial

wrong place

The workhorse of a north-facing bed that gets a couple of hours of sun.

  • Moisture: This spot sits wetter than this group tolerates. Wet feet kill far more plants than cold does.
  • Light: About 20.5 moles a day, against an ideal of 15. This is the right light band.
  • Reflected heat: Surface heat here is not the limiting factor.
This spot stays wet well past what this group survives in winter.

Watch for: These fail from dryness under a wall or a tree far more often than they fail from shade.

Examples, not recommendations: Hellebore; Geranium; Hosta where slugs allow. What is right here is a question for a nursery that can see the site.

Something to eat

Mediterranean sub-shrub

wrong place

Built for hard sun, sharp drainage and being ignored.

  • Moisture: This spot sits wetter than this group tolerates. Wet feet kill far more plants than cold does.
  • Hardiness: Zone 6.6 is outside this group's usual range of 7 to 11. Hardiness is a floor, not a plan.
  • Light: About 20.5 moles a day, against an ideal of 34. This is the right light band.
This spot stays wet well past what this group survives in winter.

Watch for: Wet feet in winter kills these more reliably than cold does. Drainage, not hardiness, is the question.

Examples, not recommendations: Lavender; Rosemary; Cistus. What is right here is a question for a nursery that can see the site.

High-heat container herb

wrong place

Wants a hot wall, a lot of light and someone who waters it.

  • Moisture: This spot sits wetter than this group tolerates. Wet feet kill far more plants than cold does.
  • Light: About 20.5 moles a day, against an ideal of 35. This is the right light band.
  • Reflected heat: Surface heat here is not the limiting factor.
This spot stays wet well past what this group survives in winter.

Watch for: A container against a sunlit wall can run twenty degrees above air temperature. That is a watering problem, not a light problem.

Examples, not recommendations: Basil; Thyme in a deep pot; Oregano. What is right here is a question for a nursery that can see the site.

Shade-tolerant container herb

wrong place

For the herb pot by the back door that only gets morning sun.

  • Moisture: This spot sits wetter than this group tolerates. Wet feet kill far more plants than cold does.
  • Light: About 20.5 moles a day, against an ideal of 16. This is the right light band.
  • Reflected heat: Surface heat here is not the limiting factor.
This spot stays wet well past what this group survives in winter.

Watch for: Below about eight moles a day these survive without ever being worth picking.

Examples, not recommendations: Parsley; Chives; Mint, contained. What is right here is a question for a nursery that can see the site.

Fruiting vegetable

wrong place

The most light-hungry thing most people try to grow, and the one most often put in the wrong place.

  • Light: This spot gives about 20.5 moles a day and this wants at least 22. It will live and it will not perform.
  • Moisture: This spot sits wetter than this group tolerates. Wet feet kill far more plants than cold does.
  • Reflected heat: Surface heat here is not the limiting factor.
This spot stays wet well past what this group survives in winter.

Watch for: Leaves grow at fifteen moles a day; fruit needs more than twenty. That gap is why people get plants and no crop.

Examples, not recommendations: Tomato; Pepper; Courgette. What is right here is a question for a nursery that can see the site.

In a container

Evergreen structural shrub

wrong place

The thing that stops a bed looking empty in February.

  • Moisture: This spot sits wetter than this group tolerates. Wet feet kill far more plants than cold does.
  • Light: About 20.5 moles a day, against an ideal of 20. This is the right light band.
  • Reflected heat: Surface heat here is not the limiting factor.
This spot stays wet well past what this group survives in winter.

Watch for: Clipped evergreens in containers dry out from the root ball in, and the damage shows a season late.

Examples, not recommendations: Box alternatives such as Japanese holly; Pittosporum; Osmanthus. What is right here is a question for a nursery that can see the site.

Mediterranean sub-shrub

wrong place

Built for hard sun, sharp drainage and being ignored.

  • Moisture: This spot sits wetter than this group tolerates. Wet feet kill far more plants than cold does.
  • Hardiness: Zone 6.6 is outside this group's usual range of 7 to 11. Hardiness is a floor, not a plan.
  • Light: About 20.5 moles a day, against an ideal of 34. This is the right light band.
This spot stays wet well past what this group survives in winter.

Watch for: Wet feet in winter kills these more reliably than cold does. Drainage, not hardiness, is the question.

Examples, not recommendations: Lavender; Rosemary; Cistus. What is right here is a question for a nursery that can see the site.

High-heat container herb

wrong place

Wants a hot wall, a lot of light and someone who waters it.

  • Moisture: This spot sits wetter than this group tolerates. Wet feet kill far more plants than cold does.
  • Light: About 20.5 moles a day, against an ideal of 35. This is the right light band.
  • Reflected heat: Surface heat here is not the limiting factor.
This spot stays wet well past what this group survives in winter.

Watch for: A container against a sunlit wall can run twenty degrees above air temperature. That is a watering problem, not a light problem.

Examples, not recommendations: Basil; Thyme in a deep pot; Oregano. What is right here is a question for a nursery that can see the site.

Shade-tolerant container herb

wrong place

For the herb pot by the back door that only gets morning sun.

  • Moisture: This spot sits wetter than this group tolerates. Wet feet kill far more plants than cold does.
  • Light: About 20.5 moles a day, against an ideal of 16. This is the right light band.
  • Reflected heat: Surface heat here is not the limiting factor.
This spot stays wet well past what this group survives in winter.

Watch for: Below about eight moles a day these survive without ever being worth picking.

Examples, not recommendations: Parsley; Chives; Mint, contained. What is right here is a question for a nursery that can see the site.

Other questions about this place