Pedicularis Densiflora is a 'facultative parasite', it can be grown without a host. Like many other parasitic plants, it can take on some of the properties of a host so make sure you know what's growing around it to avoid toxins like poison ivy etc., or simply cultivate it in a pot. In a container, adding a host plant seems to be beneficial, and I've seen recommendations of grasses like Sweet Grass for this purpose. Plant the host and the Indian Warrior at the same time, or knick the host plant at the base where you plant the Pedicularis and it should attach to the host on it's own, in theory.
The seeds are notoriously difficult to germinate, but stratification in an inert moist medium for about a month or so should increase your chances. I usually use a clear plastic bag in the fridge so I can watch for sprouts which will need to be planted soon. It's a beautiful plant and a cherished medicinal. There are several species in the Pedicularis genus that have similar properties if you don't have any luck germinating Indian Warrior you could try another type. Pedicularis Groenlandica is my favorite of these, it's purty
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