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