Information on how raspberry plants respond to plastic mulch

Raspberry plants generally respond well to plastic mulch: it suppresses weeds, warms and steadies the soil, conserves moisture, and often boosts early vegetative growth and first-year yield. In spring-planted trials, raspberries grown with plastic mulch had about 34% higher first-year yields than unmulched controls, while late-summer plantings often showed better growth and weed control but not always a yield increase.^[1]

hat the response looks like

Plastic mulch helps raspberries most when establishment is the goal. Studies found stronger vegetative growth, improved weed suppression, and warmer soil conditions, which together support better early plant performance. For summer-planted systems, the main benefit can be cleaner rows and less hand weeding even when yield gains are modest.^[2][1]

Mulch type matters

Polyethylene mulch and soil-biodegradable plastic mulch produced similar horticultural benefits in the studies I found, especially in spring-planted raspberries. Woven plastic mulch can also give comparable growth and yield results, but it is more expensive and may reduce primocane growth.^[1][2]

Pest effects

Plastic mulch may also help with pest management. In fall-bearing raspberry, black, white, and metallic mulches reduced adult spotted-wing drosophila populations by 42–51% and larval populations by 52–72% compared with the grower standard.^[3]Practical tradeoffs

The biggest tradeoffs are cost, removal/disposal, and uncertainty about long-term effects on soilborne disease, roots, and canes. Growers often still choose polyethylene mulch because the horticultural benefits are clear and the economics can work out despite disposal costs.^[2][1]

For an Edmonton garden, the main takeaway is that plastic mulch is most likely to help if you want earlier soil warming and stronger establishment, especially in a cool spring.

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• https://www.growingproduce.com/fruits/plastic-mulches-a-remarkable-thing-when-it-comes-to-growing-raspberries/    
• https://ishs.org/ishs-article/1381_38/   
• https://link.springer.com/article/10.1007/s10340-021-01456-2 
• https://pdfs.semanticscholar.org/0d1e/1b8b846a0a30a25c30f3a3fa3e3be702a853.pdf 
• https://journals.ashs.org/downloadpdf/view/journals/hortsci/41/1/article-p272.pdf 
• https://www.international-agrophysics.org/pdf-104296-35363?filename=Effects-of-plastic-mulche.pdf 
• https://www.cambridge.org/core/services/aop-cambridge-core/content/view/2C3B6AA1E4842AE9A903AAFDC902D65C/S1742170522000291a.pdf/risk-and-uncertainty-of-plastic-mulch-adoption-in-raspberry-production-systems.pdf 
• https://pdfs.semanticscholar.org/bb8e/ef72cfe920805df227a06d68e33588eef42b.pdf 
• https://ouci.dntb.gov.ua/en/works/4wa0xR89/ 
• https://maba.memberclicks.net/assets/2022June/2 Plastic mulch review.pdf