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How to use rose fungicide

Updated: October 2026

You have a bottle in one hand and a marked rose in a UK garden in the other, and the last article you read quoted a timetable from a different product. This is how to use rose fungicide without copying that timetable: hygiene first, then both leaf surfaces, then the interval printed for the bottle you are holding. The twelve listings, with their prices and review counts, stay on the [rose fungicide comparison](/hub/plant-accessories/rose-fungicide). We wrote this on 16 October 2026 from those listings, the Royal Horticultural Society’s spraying note, and Health and Safety Executive garden guidance. If you buy through our amazon.co.uk links, we may earn a commission at no extra cost to you.

You have a bottle in one hand and a marked rose in a UK garden in the other, and the last article you read quoted a timetable from a different product.

Our top picks

BugClear RoseClear 3 in 1, 2 × 800 ml

Best overall

BugClear RoseClear 3 in 1, 2 × 800 ml
4.2/10about £10.98
View offer
Provanto Provanto Fungus Fighter Plus, 2 × 1 L

Rank 2

Provanto Provanto Fungus Fighter Plus, 2 × 1 L
8.9/10about £16.00
View offer
Phostrogen Toprose Fungus Control and Protect, 1 L

Best value

Phostrogen Toprose Fungus Control and Protect, 1 L
8.6/10about £8.52
View offer
On this page
  1. 1.Read this bottle, not the last one
  2. 2.Cover both leaf surfaces and the stems
  3. 3.Up to three weeks, every seven days, or the label only
  4. 4.When to stop and what to do with the bottle

Read this bottle, not the last one

Intervals do not transfer between bottles. Toprose and Provanto say contact and systemic, up to 3 weeks. Rose Guard Natural says every 7 days. RoseClear 3 in 1 gives no day count. Westland’s amazon row has no interval, while the maker’s page says about every 7 days. A copied timetable is not the label. Read the label before you buy and again before you spray. A rank in Garden Fungicides does not fill a blank disease line. If the label says dangerous to bees, do not spray plants in flower. Do not copy that sentence onto a bottle that does not print it. If you are not sure the marks are black spot, use the rose black spot spray page before you set a repeat.

Cover both leaf surfaces and the stems

The RHS fungicide note says to wet the plant without excessive run-off or drift, including stems, buds, and the underside as well as the upper surface. Rose Guard’s bullet says shake, and spray both leaf surfaces. Westland’s maker page says cover upper and lower surfaces. None of that turns a spotted leaf green. Spraying the upper surface only is a miss. Black spot spores spread in water. Provanto’s listing says select edibles and does not print a crop table. A review says tomatoes were not approved and the plants scorched. The crop list is on the label you are holding. If you have not chosen a bottle yet, the rose fungicide buying guide is the decision tree.
BugClear RoseClear 3 in 1, 2 × 800 ml

Testsieger

BugClear RoseClear 3 in 1, 2 × 800 ml
4.2/10about £10.98
View offer

Up to three weeks, every seven days, or the label only

Up to 3 weeks belongs to Toprose 1 L at about £8.52, the Toprose twin at about £17.04, and the Provanto twin at about £16. It is not the gap for a sulphur 3-in-1 or a pesticide-free wash. This comparison’s RoseClear cell has no day count, so you read the bottle in the pack, not the Provanto bullet. Every 7 days belongs where it is printed. Rose Guard Natural, about £19.99 for 2 × 800 ml, says reapply every 7 days for powdery mildew. Westland’s maker page says about every 7 days. The amazon row for Westland does not, so the label wins. One application is not a season. Toprose reviewers say black spot can return and needs another spray.

When to stop and what to do with the bottle

Stop when the plant is not on the label, when the spray is scorching, or when a person or a pet has been caught in it. Stop for bees only if that label says so. A leaf spray does not fix dieback or honey fungus, and it will not repaint a yellowed leaf. If the bush is collapsing rather than spotting, ask a gardener or the RHS advice service. Store what is left in the original container, away from children, pets, and food. Expired stock, and anything professional-only, goes to a civic amenity site. Do not pour it down a drain. If a person or a pet has been exposed, get clinical help and take the label with you.

Common questions

Do I spray the underside of the leaf?
Yes. The RHS note says wet stems, buds, and the underside as well as the upper surface, without excessive run-off. Rose Guard’s own bullet says both leaf surfaces. Spraying only the top is a common miss, because the leaf looks treated and the underside stays dry. Shake the bottle first if the label says to. The dose and the gap still come from that label, not from this paragraph.
How soon can I spray again?
Use the interval on the bottle in your hand. Up to 3 weeks is the systemic bullet on Toprose and Provanto in this set. About every 7 days is the Rose Guard bullet, and the Westland maker page, not the systemic row. This set’s RoseClear listing has no day count. A retailer timetable for a different pack does not replace a blank label.
Can I use Provanto’s up to 3 weeks on a sulphur 3-in-1?
No. That bullet is for the contact-and-systemic listings. A sulphur or pesticide-free product in this set is on a shorter claim, or on no day count at all. Copying three weeks onto RoseClear or Westland is how a protectant gets a gap it was not given. Read the label on the 3-in-1 you bought.
What if the label says dangerous to bees?
Do not spray plants in flower or where bees are foraging. That instruction applies to the bottle that prints it. It is not a blanket line for every rose spray in the comparison, and a bottle that never mentions bees does not inherit it. A review that mentions spraying before 9am and after 7pm is evidence about that reviewer’s bottle only.
Where do I put an expired or professional-only bottle?
Take it to a civic amenity site in the original container. Do not spray a product that has left the HSE garden database, and do not pour it down a drain. If you still have myclobutanil stock, the GB approval expiry is a reason to dispose of it, not to finish the bottle on the roses. If someone has already been exposed, take the label to clinical help.

Related pages

Best rose fungicide

Rose fungicide

Rose black spot spray after you clear fallen leaves

Rose fungicide buying guide: name the symptom first

Systemic rose fungicide or sulphur: the three types

Sources

Public UK sources checked for this comparison, plus the amazon.co.uk listing facts in the display file on 16 October 2026. Shelf prices and star lines are those UK figures. HSE and RHS pages are the legal and hygiene frame. They are not a ranking of these twelve bottles.

  1. HSE: garden and home pesticide use (retrieved 16 October 2026)
  2. HSE: Sustainable Use Regulations 2012 guidance (retrieved 16 October 2026)
  3. HSE: MAPP 18223 Fungus Control and Protect (retrieved 16 October 2026)
  4. HSE: MAPP 14854 Roseclear Ultra (retrieved 16 October 2026)
  5. HSE ebulletin, 5 June 2024, myclobutanil (retrieved 16 October 2026)
  6. RHS: rose black spot (retrieved 16 October 2026)
  7. RHS: fungicides for home gardeners (retrieved 16 October 2026)
  8. Westland Fungus Guard (retrieved 16 October 2026)
  9. Toprose SDS, code 86600038 (retrieved 16 October 2026)