This may seem an odd query because absolutely all lawn tulip glasses come up season after season anyway and without any help from the citizen grower. Actually if they were that 'precious' would they really be as well-known as they are today?
Well most new, harvested types need little support when it comes to over wintering, but the exercise of raising, and securely saving tulip lights has been going on for hundreds of years and not for the factors that you might think.
Tulips develop from the hilly places of northern African-american and the southern aspect of European countries and so it isn't the freezing they have issues dealing with, in reality the tulip close relatives has a number of specialized, real downhill types that absolutly flourish in freezing weather. Howver, to live the long times of sub-zero temperature ranges downhill tulip glasses have progressed dense external seashells with a aspect of " floating " fibrous insulating material beneath - Tulipa wilsoniana is a great example of this. Don't ignore that almost all tulip glasses will need a interval of freezing dormancy otherwise they would be incapable to start blooming come the springtime.
The issue with over wintering tulip glasses - and it is because of their hill culture - is that they are illiberal of wet dirt while they are inactive. This isn't just a winter weather issue, disastrous spoils can happen over wet summertime and autumns too once the vegetation has passed away returning.
The key to effective over-wintering is to offer a dry main atmosphere and this should be resolved at the time of growing, so make sure the ground is either free emptying or in a brought up aspect of the lawn. Quite simply you are resembling their local environment which is difficult, has little rainfall fall, and if there is any water in the ground it would still be not available to the vegetation origins as for the great majority of the season because it would be frozen!
In the lawn atmosphere then it is well value including a lot of resolution, pourous pebbles etc, to the ground so that if you are in an place vulnerable to a lot of rainfall fall it will easily strain away from the origins. Moreover - and it is a little undesirable - you can also consider protecting the places where your lights are placed with brought up security to be able to keep the rainfall off the ground, but recall you will also need to allow good air circulation.This can be eliminated in the springtime as soon as the new development reveals through.
Of course you can always go returning to old university farming exercise and raise the lights once the vegetation has passed away returning, maintaining them in a awesome dry atmosphere until re-planting just before the starting of winter weather in November/December. Even now you can still have them with brought up protects if rainfall fall is predicted.