Posted: 22/08/2017 at 07:44
I don't like the whole layering thing as I don't think you ever get a good dispaly from anything, but having said that - I'd leave the tulips and have them in separate pots if you want to grow them. As r'girl says, they don't tend to return year on year - you get a couple of years or so from them, so it can be a nuisance if you then have to take them out. Some are more reliable than others, but it's only the red and yellow Apeldoorns which return, or the species tulips which are quite different. Many people treatthem as annuals and plant fresh every year.
The reticulata Irises are the same - they tend to diminish after a few years. There are plenty of narcissus of varying sizes, and flowering times, which you could layer up though - as well as the usual crocus and grape hyacinths if you like purples/lilacs.
I also use plastic pot inserts for bulbs, as well as other planting, to give succession. It's the easiest way to get impact.
If you like purples and whites, there are plenty of tulips to choose from, and I'd recommened you use a good online supplier like Peter Nyssen for them. If you choose carefully, you can get a longer season of colour by picking different types with different flowering times too.
Normal advice is to plant tulips later (November) when it's colder to avoid tulip virus, but we can plant quite early up here without issue. September/October. You could experiment to see what works for you