Residents of the Martin Acres neighborhood in Boulder who oppose the proposed Baseline Zero office and hotel project are holding a plant sale this weekend to raise money to "represent and defend neighborhood concerns."

The concept plan for Baseline Zero presented to the Boulder Planning Board in January called for a four-story, 180,000-square-foot office building on the western portion of the 3-acre site at 27th Way and Moorehead Avenue and a four-story, 70,000-square-foot extended-stay hotel on the eastern portion. Both buildings would have two levels of underground parking.

The site now houses Baseline Liquor Store, a Grease Monkey quick oil-change business and Boulder Gas. It's zoned BC-2, a zoning designation that calls for community-oriented retail. Office space and hotels are allowed uses in the BC-2 zone, and the project is what is known as a "by-right" development.

However, many neighbors want to see the site remain primarily oriented toward retail uses. They also object to height and setback variances called for in the concept plan and have concerns about the project making flooding and traffic worse.

The fundraiser will take place at 2835 Elm Ave., at the home of Lois LaCroix, from 8 a.m. to 1 p.m. Saturday and Sunday. Plants and other garden items will be available for suggested donation amounts.

Organizers said the use of the proceeds will partly depend on the next plans presented by the developers. However, neighbors are interested in conducting their own traffic and hydrology studies and may hire an attorney as well.