My brain almost lights up whenever heraldry comes up — the image of House Tyrell that clicks for me is the golden rose on a green field. In the novels by George R. R. Martin, particularly within 'A Song of Ice and Fire', the Tyrells are repeatedly associated with roses: their arms are described as a single golden rose set against green, which fits so perfectly with Highgarden and all those lush, cultivated images. Their words, for the curious, are 'Growing Strong', and that pairing of motto and sigil sells the whole idea of fertility, prosperity, and the slow, steady accumulation of influence.
I love how the symbol works on multiple levels. As a reader I've caught little moments where clothes, banners, and even culinary descriptions carry that floral touch — a gown trimmed with gold roses, a hall draped in green. Compared to a blunt sigil like the Lannisters' lion or the Starks' direwolf, the rose feels elegant and strategic: it suggests beauty but hides thorns. If you like diving into symbolism, look at how the rose imagery shows up in characters — from Margaery's public charm to Olenna's sharp wit — it’s like the authors used the sigil as a shorthand for the house's methods. If you ever want to sketch it, go for a stylized five-petal rose in gold atop a deep green background; it's simple, iconic, and reads instantly whether on a banner or a lapel pin.