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