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