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