They aren't fussy about humidity. After that, these plants can survive in some periods of. red hot poker plant poisonous. Red hot pokers do best in moderate temperatures, between 60ºF and 90ºF. Learn how to choose a variety of this unusual, flowering perennial for your growing conditions. Trim and treat with fungicide to combat root decay effectively. . Unless soil is of very. All about Red Hot Poker plants, aka Torch Lilies. Spotting the. I like the plant - it should do well in my garden and. A plant I like, but for the moment is missing from my garden, is red hot poker (Kniphofia uvaria). Red hot poker plant care involves regular watering until these plants are established. Fertilizer. Enhance soil drainage and adjust watering to prevent future rot.