The north-facing city garden

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 10.2 moles of usable light a day with about 2 hours of direct sun in high summer. That is part shade, whatever the label on the plant says.

Of the groups in the reference set, fern for cool damp shade is the one that actually belongs in conditions like these. Anything planted here sits wet for 12 months of the year, so drainage is the decision before the plant is.

Growing-season light

10.2

mol/m²/day

April to September, averaged

Midsummer direct sun

2

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
Jan3.30 hnot that daydeep shade
Feb4.70 hnot that dayshade
Mar6.40 hnot that dayshade
Apr8.10 hnot that dayshade
May10.81 hnot that daypart shade
Jun13.32 hnot that daypart shade
Jul13.12 hnot that daypart shade
Aug9.10.5 hnot that dayshade
Sep6.70 hnot that dayshade
Oct5.20 hnot that dayshade
Nov3.60 hnot that daydeep shade
Dec2.80 hnot that daydeep shade

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.
  • Reflected heat: Surfaces here reach about 142°F. A container in that is a watering commitment, not a planting decision.
  • Light: About 10.2 moles a day, against an ideal of 22. This is the right light band.
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.
  • Reflected heat: Surfaces here reach about 142°F. A container in that is a watering commitment, not a planting decision.
  • Light: About 10.2 moles a day, against an ideal of 24. This is the right light band.
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.
  • Reflected heat: Surfaces here reach about 142°F. A container in that is a watering commitment, not a planting decision.
  • Light: About 10.2 moles a day, against an ideal of 26. This is the right light band.
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.

  • Light: This spot gives about 10.2 moles a day and this wants at least 16. 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.
  • Hardiness: Zone 6.6 is outside this group's usual range of 7 to 10. Hardiness is a floor, not a plan.
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.

  • Light: This spot gives about 10.2 moles a day and this wants at least 14. 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: Surfaces here reach about 142°F. A container in that is a watering commitment, not a planting decision.
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.

  • Light: This spot gives about 10.2 moles a day and this wants at least 14. 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: Surfaces here reach about 142°F. A container in that is a watering commitment, not a planting decision.
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

Fern for cool damp shade

belongs here

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

  • Reflected heat: Surfaces here reach about 142°F. A container in that is a watering commitment, not a planting decision.
  • Moisture: This spot sits wetter than this group tolerates. Wet feet kill far more plants than cold does.
  • Light: About 10.2 moles a day, against an ideal of 10. This is the right light band.

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.

Moisture-loving marginal

will work

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

  • Reflected heat: Surfaces here reach about 142°F. A container in that is a watering commitment, not a planting decision.
  • Light: About 10.2 moles a day, against an ideal of 24. This is the right light band.
  • Moisture: Moisture here sits inside what this group will accept.

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.

Deep-shade foliage plant

will work

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

  • Reflected heat: Surfaces here reach about 142°F. A container in that is a watering commitment, not a planting decision.
  • Moisture: This spot sits wetter than this group tolerates. Wet feet kill far more plants than cold does.
  • Light: About 10.2 moles a day, against an ideal of 7. This is the right light band.

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.

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.
  • Reflected heat: Surfaces here reach about 142°F. A container in that is a watering commitment, not a planting decision.
  • Light: About 10.2 moles a day, against an ideal of 22. This is the right light band.
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.

Ground cover

Fern for cool damp shade

belongs here

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

  • Reflected heat: Surfaces here reach about 142°F. A container in that is a watering commitment, not a planting decision.
  • Moisture: This spot sits wetter than this group tolerates. Wet feet kill far more plants than cold does.
  • Light: About 10.2 moles a day, against an ideal of 10. This is the right light band.

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

will work

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

  • Reflected heat: Surfaces here reach about 142°F. A container in that is a watering commitment, not a planting decision.
  • Moisture: This spot sits wetter than this group tolerates. Wet feet kill far more plants than cold does.
  • Light: About 10.2 moles a day, against an ideal of 7. This is the right light band.

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.

Rain garden and swale planting

will work

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

  • Light: This spot gives about 10.2 moles a day and this wants at least 12. It will live and it will not perform.
  • Reflected heat: Surfaces here reach about 142°F. A container in that is a watering commitment, not a planting decision.
  • Moisture: Moisture here sits inside what this group will accept.

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.

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.
  • Reflected heat: Surfaces here reach about 142°F. A container in that is a watering commitment, not a planting decision.
  • Light: About 10.2 moles a day, against an ideal of 15. This is the right light band.
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

High-heat container herb

wrong place

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

  • Light: This spot gives about 10.2 moles a day and this wants at least 20. 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.
Light here is less than half what this needs. No amount of feeding or watering substitutes for it.

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.
  • Reflected heat: Surfaces here reach about 142°F. A container in that is a watering commitment, not a planting decision.
  • Light: About 10.2 moles a day, against an ideal of 16. This is the right light band.
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 10.2 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: Surfaces here reach about 142°F. A container in that is a watering commitment, not a planting decision.
Light here is less than half what this needs. No amount of feeding or watering substitutes for it.

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.

Leafy salad crop

wrong place

The one edible that actually prefers a spot that is not baking.

  • Moisture: This spot sits wetter than this group tolerates. Wet feet kill far more plants than cold does.
  • Reflected heat: Surfaces here reach about 142°F. A container in that is a watering commitment, not a planting decision.
  • Light: About 10.2 moles a day, against an ideal of 20. This is the right light band.
This spot stays wet well past what this group survives in winter.

Watch for: In high heat these bolt. A spot that is too shady for tomatoes is often exactly right for these.

Examples, not recommendations: Lettuce; Chard; Rocket. 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.
  • Reflected heat: Surfaces here reach about 142°F. A container in that is a watering commitment, not a planting decision.
  • Light: About 10.2 moles a day, against an ideal of 20. This is the right light band.
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.

High-heat container herb

wrong place

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

  • Light: This spot gives about 10.2 moles a day and this wants at least 20. 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.
Light here is less than half what this needs. No amount of feeding or watering substitutes for it.

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.
  • Reflected heat: Surfaces here reach about 142°F. A container in that is a watering commitment, not a planting decision.
  • Light: About 10.2 moles a day, against an ideal of 16. This is the right light band.
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 10.2 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: Surfaces here reach about 142°F. A container in that is a watering commitment, not a planting decision.
Light here is less than half what this needs. No amount of feeding or watering substitutes for it.

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.

Other questions about this place