DNeasy Plant Kits provide a fast and easy way to purify DNA from plant and fungal tissue. Up to 100 mg of tissue can be processed using the DNeasy Plant Mini Kit or up to 1 g of tissue using the DNeasy Plant Maxi Kit.
The typical yield is 3–260 µg, with a sample size of up to 1 g wet weight, and an elution volume of 50 µl to 2 ml. DNA yields vary between different species and tissues depending on genome size, ploidy, cell number and tissue sample age.
I have previously used the DNeasy Plant Mini kits for pollen DNA extraction. You should be able to use the Maxi kits as well, it is only a sizing difference.