Trim and treat with fungicide to combat root decay effectively. All about Red Hot Poker plants, aka Torch Lilies. Red hot pokers do best in moderate temperatures, between 60ºF and 90ºF. Spotting the. I like the plant - it should do well in my garden and. red hot poker plant poisonous. After that, these plants can survive in some periods of. Enhance soil drainage and adjust watering to prevent future rot. Learn how to choose a variety of this unusual, flowering perennial for your growing conditions. . 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). Unless soil is of very. Red hot poker plant care involves regular watering until these plants are established. Fertilizer.