Bonide Captain Jack's Neem Oil Concentrate (16 oz) Review (2026)
By Nate Sawyer, Editor · Updated July 2026
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- 3 in 1
- Fungus
- Mites
- Organic
- Roses
A versatile organic-gardening standby: this clarified neem extract works as a 3-in-1 insecticide, miticide and fungicide (blackspot, mildew, rust) and is labeled for edibles up to harvest. Follow the label: as an oil it can scorch leaves in hot sun above ~90F so spray in cool hours, it is toxic to bees while wet so apply at dusk, and it needs repeated coverage.
Pros
- Three-in-one: works as an insecticide, miticide, and fungicide on many common garden problems
- Labeled for use on vegetables, fruits, and ornamentals right up to harvest
- Also disrupts insect feeding and growth stages, not just adults
Cons
- Oil sprays can scorch leaves if applied in hot sun or above ~90°F — apply in cool morning/evening
- Toxic to bees and other pollinators while spray is wet; spray at dusk and avoid open blooms
- Needs thorough, repeated coverage and can leave an odor/residue; not a fast knockdown
Specifications
| Active | Clarified hydrophobic extract of neem oil (70%) |
|---|---|
| Organic | For organic gardening (clarified neem extract) |
| Targets | Insects, mites + fungal diseases (blackspot, powdery mildew, rust) |
| Use on edibles | Yes, up to day of harvest per label |
| Safety | Oil can burn foliage in heat/sun; toxic to bees when wet — spray at dusk; follow label |
Frequently Asked Questions
- When should you spray neem oil?
- Cool morning or evening, and never above about 90F or in hot sun — oil sprays scorch leaves under those conditions. Spraying at dusk also protects bees, which the spray is toxic to while wet.
- Can you use neem oil on vegetables you are about to pick?
- It is labeled for vegetables, fruits and ornamentals right up to harvest. Follow your specific product label, since formulations and intervals differ.
- Is neem a fast knockdown?
- No. It needs thorough, repeated coverage and works partly by disrupting insect feeding and growth stages rather than killing on contact. It can also leave an odor and residue, so it is a program rather than a one-shot fix.