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