Downy Mildew across the plant library
17 of the 505 plant guides in this library name downy mildew among their diseases. Every one is listed below, linked to its guide and grouped by the kind of plant it is, so you can see at a glance which corners of a garden it turns up in.
This is the library read down a column instead of across a row. Each plant guide names its own diseases; nobody publishes the other view — which of the plants you actually grow share one, and whether the timing they record agrees.
The 17 plants that list downy mildew
Grouped by plant type. Where the library attached a note to the entry — “rare”, “on seedlings”, “in wet clay” — that note is printed next to the plant, verbatim, because two plants can name the same disease and mean opposite things by it.
annuals15
BasilOcimum basilicumdevastating
Bok ChoyBrassica rapa subsp. chinensis
BroccoliBrassica oleracea var. italica
CauliflowerBrassica oleracea var. botrytis
ColeusColeus scutellarioides
CucumberCucumis sativus
Holy Basil (Tulsi)Ocimum tenuiflorumless prone than sweet basil
ImpatiensImpatiens wallerianadevastated old strains; buy resistant 'Beacon'/'Imara'
LettuceLactuca sativa
Luffa GourdLuffa aegyptiaca
Pansy & ViolaViola × wittrockiana
QuinoaChenopodium quinoain humidity — its main enemy
SpinachSpinacia oleracea
Stock (Gillyflower)Matthiola incana
SunflowerHelianthus annuus
bulb1
Where it concentrates
Botanical families with more than one affected plant in the library, counted from the same 17 guides above. 4 of 17 are Brassicaceae.
- Brassicaceae4 plants
- Lamiaceae3 plants
- Amaranthaceae2 plants
- Asteraceae2 plants
- Cucurbitaceae2 plants
How the library qualifies it
Every distinct note the guides attach to an entry for downy mildew, verbatim, with how many plants carry it. The other 12 guides list it bare, with no qualifier at all.
- devastated old strains; buy resistant 'Beacon'/'Imara'
- devastating
- in humidity — its main enemy
- less prone than sweet basil
- the hop disease — resistant varieties + airflow
Shared timing — and where it doesn’t agree
The library records no treatment window for downy mildew. 11 of these 17 guides do record a spray or management program, but every one of them is about something else — a blight schedule, a curculio spray, a mildew note. None names downy mildew. Rather than manufacture a consensus out of unrelated entries, this page reports the absence. The individual guides carry whatever timing the library does hold.
Timing only — the label is the law
This page reports when the guides in this library say to watch for downy mildew and when a treatment is worth considering. It is not a recommendation to apply any product. Read and follow the product label before you spray — under federal law the label is the legal instruction, and using a pesticide against it is illegal.
- Check the pre-harvest interval. Every product that’s cleared for an edible crop sets a minimum number of days between spraying and picking. Find it on the label before you spray anything you intend to eat.
- Check the re-entry interval before you or anyone else works in the treated area again, and use the protective equipment the label names.
- Confirm the product is registered for your crop in your state. This page groups many different crops together, and a product legal on one of them is not legal on all of them — state registrations differ too. Your state pesticide agency or local extension office can confirm both.
- Rates and mixing instructions come from the label, never from us. We don’t publish them because they differ by product and formulation.
What else these plants get
Counted over the same 17 guides: the other problems most often listed on a plant that lists downy mildew. These are co-occurrences in the library’s own records, not a claim that one causes another.