Gloria - Primrose lilacs are not very yellow... I've never actually seen one in person blooming because they're extremely extremely EXTREMELY rare. I looked for 4 years before I found one... at Lowes at that!! They were the little tiny 1 quart buckets so it hasn't blossomed.. but this year I know that it will this year, it has at least 2-3 flower buds on it! I'm so excited.. I can't wait to see it! I've seen pictures where they're truly yellow, I've seen pictures where they're a creamy yellow, and I've seen pictures that make them look like parchment yellow/white. Only time will tell what mine will blossom out. I want to get a couple of more James McFarlane as I don't have hardly any pink flowers anywhere.