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