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Light requirements

How much light does Crataegus laevigata 'Paul's Scarlet' (Crataegus laevigata 'Paul's Scarlet') need?

Also called Paul's Scarlet Hawthorn, Double Red Hawthorn.

More about crataegus laevigata 'paul's scarlet'

About Crataegus laevigata 'Paul's Scarlet'

Crataegus laevigata 'Paul's Scarlet' · also called Paul's Scarlet Hawthorn, Double Red Hawthorn · flowering

'Paul's Scarlet' is a small, exceptionally hardy hawthorn smothered in double, deep rose-pink to scarlet flowers in late spring. Tough, thorny and wind-firm, it tolerates pollution, exposure and poor soils, making a reliable specimen or street tree. The double blooms set little fruit, so it is a flowering rather than berrying form.

Comfort temperature: -35 to 32°C

Watch for — Fireblight: Susceptible to fireblight (Erwinia amylovora), which blackens shoots and flower trusses as if scorched. Prune out infected wood well into healthy tissue and disinfect tools between cuts.

The exact light crataegus laevigata 'paul's scarlet' needs

Crataegus laevigata 'Paul's Scarlet' is a sun worshipper — it wants the brightest, most direct light you can physically give it indoors, and starves in the "bright indirect" most houseplants enjoy.

Put a number on it — this is what a meter (or a free phone light-meter app) should read where crataegus laevigata 'paul's scarlet' sits:

In plain terms, An unobstructed south-facing window (or west), pressed right up against the glass — 0 to 2 ft back. Several hours of genuinely direct sun on the leaves is the target, not just a bright room. North windows and anywhere more than a few feet from the glass. A spot that grows pothos perfectly will slowly etiolate crataegus laevigata 'paul's scarlet'.

Not sure how to read the light in your home? Our light meter guide walks through measuring footcandles and lux with a free phone app and turning the reading into a placement decision for crataegus laevigata 'paul's scarlet'.

Signs crataegus laevigata 'paul's scarlet' is getting too much light

The most exposed leaves show it first. For crataegus laevigata 'paul's scarlet' specifically, watch for:

Light damage does not heal — a scorched leaf stays scorched — so the fix is to move crataegus laevigata 'paul's scarlet' out of the harsh light rather than wait for it to recover.

Signs crataegus laevigata 'paul's scarlet' is not getting enough light

Too little light is slower and sneakier than too much. The classic tell is etiolation: the plant stretches and pales as it reaches for a window. For crataegus laevigata 'paul's scarlet', look for:

If crataegus laevigata 'paul's scarlet' is stretched, leggy and pale, our guide to leggy, stretched plants covers how to fix it and whether it can be pruned back into shape. Treating crataegus laevigata 'paul's scarlet' like an average houseplant and parking it "in a bright room" away from the glass. For a sun lover, indirect light is a slow decline — it stretches, weakens and stops flowering long before it ever dies.

Where to put crataegus laevigata 'paul's scarlet': the best window and room

Indoors, the only reliable spot for crataegus laevigata 'paul's scarlet' is hard against a south or west window. Outdoors in summer it is happiest in full sun once hardened off over a week. A sunny conservatory, glazed balcony or the brightest windowsill in the home is ideal; a north room will never be enough no matter how "bright" it feels to your eye, because eyes adjust to dimness far better than plants do.

  1. Find your brightest window. For crataegus laevigata 'paul's scarlet' that means a south or west window with no tree, awning or building blocking it. East is a distant third; north will not do.
  2. Put it right at the glass. Place crataegus laevigata 'paul's scarlet' within 0–2 ft of the pane so the sun actually lands on the leaves. Every foot back roughly halves the light it receives.
  3. Harden up after any move. Moving from a dim spot to full sun? Increase exposure over 7–14 days so the leaves acclimatise, or even a sun lover will scorch.
  4. Rotate and recheck seasonally. Quarter-turn the pot weekly for even growth, and reassess in autumn — the same window gives far less light in winter.

Does crataegus laevigata 'paul's scarlet' need a grow light?

Crataegus laevigata 'Paul's Scarlet' is one of the few houseplants where a strong grow light genuinely earns its place: in a dark flat, a high-output full-spectrum LED run 10–12 hours a day, kept close, can replace the south window it cannot get. Weak desk lamps will not cut it for a sun lover — match the intensity, not just the colour.

The seasonal light shift (why winter changes everything)

From October to February the sun is low, weak and short. Crataegus laevigata 'Paul's Scarlet' that thrives on a summer windowsill can stall or etiolate over winter even in the same spot. Move it to the very brightest window for the dark months, clean the glass, and accept slower growth — or supplement with a grow light. It will not need feeding while light is this low.

Light and watering are linked: a plant in weaker winter light photosynthesises and drinks far less, so the same routine that worked in summer can rot it. See how often to water crataegus laevigata 'paul's scarlet' for the season-by-season schedule that pairs with this light plan.

Crataegus laevigata 'Paul's Scarlet' light requirements — frequently asked questions

How much light does crataegus laevigata 'paul's scarlet' need?

Crataegus laevigata 'Paul's Scarlet' needs Roughly 1,000–2,000+ fc at the leaf (a high-light plant). Around 10,000–20,000+ lux — full, direct sun, not filtered. An unobstructed south-facing window (or west), pressed right up against the glass — 0 to 2 ft back. Several hours of genuinely direct sun on the leaves is the target, not just a bright room.

Can crataegus laevigata 'paul's scarlet' survive in low light?

No, not really. Crataegus laevigata 'Paul's Scarlet' is a sun lover — in low light it etiolates: it stretches, pales, weakens and slows right down. It will not instantly die, but it steadily declines and never looks its best.

What are the signs crataegus laevigata 'paul's scarlet' is getting too much light?

Bleached, washed-out leaf colour and dry, papery brown scorch patches where the midday sun hits hardest. Crispy edges on the most exposed leaves while shaded ones stay fine. Scorch right after a sudden move into raw sun without hardening off over a week or two. Treating crataegus laevigata 'paul's scarlet' like an average houseplant and parking it "in a bright room" away from the glass. For a sun lover, indirect light is a slow decline — it stretches, weakens and stops flowering long before it ever dies.

What are the signs crataegus laevigata 'paul's scarlet' is not getting enough light?

Etiolation — crataegus laevigata 'paul's scarlet' stretches, the gaps between leaves lengthen, and growth gets pale, thin and floppy reaching for a window. Weak, leaning, leggy stems and a generally faded, drawn-out look. Few or no flowers, and far slower growth than a well-lit specimen of the same plant. If you see this, move crataegus laevigata 'paul's scarlet' closer to the light or add a grow light — and check our guide on leggy, stretched plants.

Does crataegus laevigata 'paul's scarlet' need a grow light?

Crataegus laevigata 'Paul's Scarlet' is one of the few houseplants where a strong grow light genuinely earns its place: in a dark flat, a high-output full-spectrum LED run 10–12 hours a day, kept close, can replace the south window it cannot get. Weak desk lamps will not cut it for a sun lover — match the intensity, not just the colour.

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