The courtyard with two different privacy problems

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 33.6 moles of usable light a day with about 14 hours of direct sun in high summer. That is full sun, whatever the label on the plant says.

Of the groups in the reference set, shade-tolerant lawn or alternative is the one that actually belongs in conditions like these. Anything planted here sits wet for 8 months of the year, so drainage is the decision before the plant is.

Growing-season light

33.6

mol/m²/day

April to September, averaged

Midsummer direct sun

14

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
Jan9.69 hnot that dayshade
Feb15.110 hnot that daypart shade
Mar21.811 hnot that daypart sun
Apr29.312.5 hnot that dayfull sun
May34.713.5 h10 hfull sun
Jun38.514.5 h9.3 hfull sun
Jul38.214 h9 hfull sun
Aug33.813 h9 hfull sun
Sep27.611.5 hnot that daypart sun
Oct18.910 hnot that daypart sun
Nov10.89 hnot that daypart shade
Dec89 hnot that dayshade

Screening

Mixed native hedge

belongs here

The cheapest screening per metre and the best for everything that is not a person.

  • Light: About 33.6 moles a day, against an ideal of 28. 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: Mixed hedges take four years to be a screen and want cutting once a year to stay one.

Examples, not recommendations: Regional native hedging mixes. What is right here is a question for a nursery that can see the site.

Contained clumping bamboo

belongs here

Fast, tall, evergreen screening, and the one plant most likely to become somebody else's problem.

  • Light: About 33.6 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: Only clumping species, and only with a root barrier. Running bamboo in a small garden is a decade-long regret.

Examples, not recommendations: Clumping Fargesia. What is right here is a question for a nursery that can see the site.

Deciduous hedge that holds its leaves

belongs here

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

  • Light: About 33.6 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: 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.

Large evergreen screening shrub

belongs here

Height and depth quickly, at the cost of the space it takes.

  • Light: About 33.6 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: These reach the height quickly and then keep going. Plan the maintenance, not just the planting.

Examples, not recommendations: Photinia; Viburnum tinus; Laurel where it is not invasive. What is right here is a question for a nursery that can see the site.

Shade

Medium deciduous shade tree

belongs here

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

  • Light: About 33.6 moles a day, against an ideal of 30. 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: 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

belongs here

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

  • Light: About 33.6 moles a day, against an ideal of 30. 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: 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

Espaliered fruit on a warm wall

belongs here

The most productive use of a sunny wall there is, and it takes real commitment.

  • Light: About 33.6 moles a day, against an ideal of 34. 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: This needs pruning twice a year, forever. Skipped for two seasons it becomes a shrub against a wall.

Examples, not recommendations: Apple; Pear; Fig in warm positions. What is right here is a question for a nursery that can see the site.

Medium deciduous shade tree

belongs here

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

  • Light: About 33.6 moles a day, against an ideal of 30. 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: 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.

Wind-tolerant ornamental grass

belongs here

Movement instead of resistance, which is why these survive a balcony.

  • Light: About 33.6 moles a day, against an ideal of 30. 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: Grasses in containers on a windy terrace dry out faster than anything else on the plot.

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

Small ornamental tree

belongs here

Structure and a canopy edge without committing the whole garden to shade.

  • Light: About 33.6 moles a day, against an ideal of 28. 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: Many small trees resent reflected heat off a wall far more than they resent full sun.

Examples, not recommendations: Crabapple; Japanese maple in sheltered positions; Redbud. What is right here is a question for a nursery that can see the site.

Ground cover

Shade-tolerant lawn or alternative

belongs here

The most common failed planting in any garden, usually because it was never a light problem people checked.

  • Light: About 33.6 moles a day, against an ideal of 30. 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: Below about twelve moles a day, no grass mix holds. That is when a different ground cover is the answer, not more seed.

Examples, not recommendations: Fine fescue mixes; Clover and micro-clover blends; Moss, accepted rather than fought. What is right here is a question for a nursery that can see the site.

Prairie and steppe perennial matrix

belongs here

Planted as a community rather than as specimens, and it wants full sun and poor soil.

  • Moisture: Moisture here sits inside what this group will accept.
  • Light: About 33.6 moles a day, against an ideal of 36. This is the right light band.
  • Reflected heat: Surface heat here is not the limiting factor.

Watch for: Rich soil and shade both make it flop. It is a group that is ruined by kindness.

Examples, not recommendations: Echinacea; Little bluestem; Achillea. What is right here is a question for a nursery that can see the site.

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 33.6 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.

Alpine and scree plants

belongs here

Built for thin, sharp-draining ground in hard light. Wet feet kill these long before cold does.

  • Moisture: This spot sits wetter than this group tolerates. Wet feet kill far more plants than cold does.
  • Light: About 33.6 moles a day, against an ideal of 34. This is the right light band.
  • Reflected heat: Surface heat here is not the limiting factor.

Watch for: Almost nothing here is about temperature. Winter wet at the crown is what finishes them, so drainage beats hardiness every time.

Examples, not recommendations: Saxifrage; Sempervivum; Dianthus in gritty soil. What is right here is a question for a nursery that can see the site.

Something to eat

Espaliered fruit on a warm wall

belongs here

The most productive use of a sunny wall there is, and it takes real commitment.

  • Light: About 33.6 moles a day, against an ideal of 34. 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: This needs pruning twice a year, forever. Skipped for two seasons it becomes a shrub against a wall.

Examples, not recommendations: Apple; Pear; Fig in warm positions. What is right here is a question for a nursery that can see the site.

High-heat container herb

belongs here

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 33.6 moles a day, against an ideal of 35. This is the right light band.
  • Reflected heat: Surface heat here is not the limiting factor.

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.

Fruiting vegetable

belongs here

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

  • Moisture: Moisture here sits inside what this group will accept.
  • Light: About 33.6 moles a day, against an ideal of 38. This is the right light band.
  • Reflected heat: Surface heat here is not the limiting factor.

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.

Soft fruit canes

belongs here

Reliable in less light than people expect, and destroyed by still, damp air.

  • Light: About 33.6 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: Surfaces here reach about 130°F. A container in that is a watering commitment, not a planting decision.

Watch for: Airflow matters more than the last few moles of light. A still corner gives mildew every year whatever else is right.

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

In a container

Wind-tolerant ornamental grass

belongs here

Movement instead of resistance, which is why these survive a balcony.

  • Light: About 33.6 moles a day, against an ideal of 30. 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: Grasses in containers on a windy terrace dry out faster than anything else on the plot.

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

High-heat container herb

belongs here

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 33.6 moles a day, against an ideal of 35. This is the right light band.
  • Reflected heat: Surface heat here is not the limiting factor.

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.

Contained clumping bamboo

belongs here

Fast, tall, evergreen screening, and the one plant most likely to become somebody else's problem.

  • Light: About 33.6 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: Only clumping species, and only with a root barrier. Running bamboo in a small garden is a decade-long regret.

Examples, not recommendations: Clumping Fargesia. What is right here is a question for a nursery that can see the site.

Seasonal container display

belongs here

Deliberately temporary, which makes it the right answer to an awkward spot.

  • Light: About 33.6 moles a day, against an ideal of 28. 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: Daily watering in summer. If nobody will do that, this is a plan to buy plants and kill them.

Examples, not recommendations: Regional bedding for the season. What is right here is a question for a nursery that can see the site.

Other questions about this place