It's that time of year.

Garden centers and catalog purveyors are offering discounts and advertising sales on plant material as the gardening season slowly comes to a close.

Here are a few I found on the Internet. If you know of others, or if there are any Mid-Atlantic garden centers planning big sales, let me know and I will post them!

Jackson & Perkins, the rose people, are advertising groundcover roses. The more you purchase, the more you save. We've talked about groundcovers before on Garden Variety, but not about using roses in this role. Interesting! J&P also has a bunch of sale items for as much as 75 percent off.

Dutch Gardens is offering $25 off orders of $50 or more, including sale items. Check out the Estate Collections: as many as 750 tulip bulbs for $554. To place your order by phone, call 1-888-821-0448 and mention code MKA7033B. The offer expires Sept. 3. Dutch Gardens is also offering its reblooming daylily collection - five plants for $29.95.

And Wayside Gardens is offering 25 percent off Internet exclusive trees, shrubs and perennials if ordered by Aug. 22. There are also a number of trees, shrubs and plants on sale. In addition, if you can name the mystery plant shown in a partial photo, you might win a $100 gift certificate. The winner will be chosen from among all correct entries.

Photo credit/Dutch Gardens