I’ve been growing Crocus x Luteus ‘Yellow Mammoth’ for a few years, and am always pleased with how cheery this bright golden crocus looks in early spring. Being the last of my crocus to flower, it extends the crocus display time. These have been very hardy in my zone 3 garden. They are finished now, three quarters of the way through May.
‘Yellow Mammoth’ are a golden coloured crocus that make a nice contrast to the many purple crocus in the garden. The Mammoth name is a bit misleading as they are not that large. They are bigger than the small early Crocus chrysanthus (snow crocus), but smaller than the Crocus vernus (large Dutch crocus). When the sun shines the petals on ‘Yellow Mammoth’ open a little flatter and wider than the Crocus vernus.
You can see the very faint stripes that are present at the base of the outside of the ‘Yellow Mammoth’ petals in the picture above, but you don’t really notice them in the garden, even when the petals are folded up first thing in the morning.
These are crocus are especially sunny looking, and really brighten the early spring garden. Here they seem to be bouncing the sun’s colour intensity right off of their petals.
Each corm produces many flowers, so they make a dense carpet of that golden yellow colour above the silver striped leaves. Those newly emerging buds have a deeper orange colour before they fully open.
Their orange yellow color makes a strong contrast with purple crocus. In this overhead picture, the deep orange centre is visible on the base inside the petals. Crocus vernus ‘Pickwick’ is the purple striped one behind.
Here are some of the surrounding crocus, showing how vibrant ‘Yellow Mammoth’ looks as a contrast to the purple. Just behind them are a group of white Crocus vernus ‘Silver Coral’, and to the upper left are some Crocus vernus ‘Pickwick. At the middle of the top you can see the edge of a larger group of solid purple Crocus vernus ‘Romance’. For most of the year, my garden colour schemes tend to be more subtle, but after many months of white winter, a vibrant pop of colour is very cheery and Crocus x luteus ‘Yellow Mammoth’ gives the garden a sunny glow.