Will Call customers will be told the approximate date of delivery when they place their order. We ask that Will Call customers call us not less than seven business days prior to the date they anticipate needing propane, or when your tank reaches 30 percent. Please do not wait until your propane supply is less than 30 percent to request propane service. In addition to other helpful account information, customers who enroll in MyFerrellgas can also view their delivery information. Please note that during certain weather conditions outside the control of Ferrellgas, the delivery period may be extended.