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