🐛✗ Tested and false“A quince tree stripped of most of its leaves by leaf blight in a wet summer only suffers a cosmetic setback, with no real effect on the harvest”
Tree vigour and cropping can be reduced in severe cases, not just leaf appearance. A quince that loses most of its canopy to blight has less leaf area to feed the fruit and build next year's growth, so treating a bad defoliation year as purely cosmetic understates the real cost to the tree.
Our read The RHS page doesn't say how many bad years in a row it takes before the drop in vigour becomes visible or lasting, only that severe cases can reduce both vigour and cropping. Treat one wet, badly affected summer as a genuine setback worth responding to with hygiene and feeding, not something to shrug off.
What to do: In a season with heavy leaf loss, rake and destroy the fallen leaves over winter and feed the tree well the following spring to help it recover its vigour.
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“'Serbian Gold' and 'Aromatnaya' are resistant quince varieties that won't get leaf blight”
In an RHS Garden Wisley trial during a wet summer, both 'Serbian Gold' and 'Aromatnaya' still developed leaf spots growing alongside more susceptible cultivars, so neither variety is immune to the fungus. What set them apart was how contained the damage stayed: the spots remained small, with little or no premature leaf fall, rather than the spots never appearing at all.
Our read Calling these varieties resistant overstates a real result. Tolerant is the more accurate word: they still catch the disease, they just cope with it noticeably better than susceptible cultivars did in the same wet conditions.
What to do: Where leaf blight has been a recurring problem, or in a consistently wet garden, choosing 'Serbian Gold' or 'Aromatnaya' should mean smaller spots and less leaf drop, not a tree that never shows symptoms at all.
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- RHS: Quince leaf blight'Serbian Gold' and 'Aromatnaya' showed good tolerance in an RHS Garden Wisley trial during a wet summer, still developing leaf spots but with little or no premature leaf fall.
“A quince tree with leaf blight shouldn't be planted near pear trees, because the disease will spread across and cause similar damage there”
The fungus behind quince leaf blight can infect several other Rosaceae plants including pear, hawthorn and medlar, so cross-infection between a quince and a nearby pear is a real possibility rather than an invented risk. But outbreaks on these secondary hosts are sporadic and far less damaging than on quince itself, so the same disease showing up on a neighbouring pear doesn't mean it will cause comparable harm there.
Our read The shared fungus is real, so this isn't a myth to dismiss outright, just one that overstates the risk. A quince with blight is not a reason to remove or avoid planting a nearby pear.
What to do: Keep up the same leaf-raking and dead-wood hygiene around any pear, hawthorn or medlar growing near an infected quince, but don't expect or treat it as needing the same level of concern as the quince itself.
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- RHS: Quince leaf blightThe disease can also affect other Rosaceae plants including hawthorn, medlar, pyracantha and pear, but outbreaks on these hosts are sporadic and usually far less damaging than on quince.
“Raking up and destroying fallen quince leaves each autumn genuinely reduces how much leaf blight comes back the following spring, rather than being just tidiness”
The fungus behind quince leaf blight overwinters on dead twigs and the fallen leaves left on or near the tree, and it's from that leftover material that spores start the next spring's infections. Removing and destroying the leaves and pruning out dead shoots over winter directly targets that overwintering source, which is exactly why it's a recommended response rather than optional garden tidying.
Our read The RHS page describes the mechanism and recommends the practice, but doesn't publish a trial measuring how much smaller next year's outbreak is with versus without raking. The case for it rests on the fungus's known biology rather than a head-to-head field result.
What to do: Rake up and dispose of fallen quince leaves through autumn and winter rather than leaving them under the tree, and prune out any dead shoot tips while the tree is dormant.
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- RHS: Quince leaf blightThe fungus overwinters on fallen leaves and dead twigs, and recommends raking up and destroying affected leaves and pruning out dead shoots as part of the response.
