Bullish (Video) Poisonous Plants: Identifying Poison Oak, Ivy, & Sumac. Posted: March 22, 2025 | Last updated: March 22, 2025. This film explores the beauty and dangers of various poisonous plants.

If you've never received a rash from poison oak, ivy or sumac, the rash could last 21 days or longer. If you have had the rash previously, it will last one to 14 days.