Enter all or part of the plant name - at least 3 letters. Avoid extra descriptive words like "New", "Bush", "Tree" etc.
Your search will be faster and fewer unwanted results will be returned if you make your search entry more concise. For example, suppose you are looking for Caryopteris x clandonensis 'Longwood Blue.' You could enter the entire name and the plant would be found. Or you could simply enter Longwood Blue, and the plant would also be found. If you were unsure how to spell Caryopteris, you could simply enter: Car Longwood Blue, and the plant would also be found. The more concise you make your search entry, the less chance for a spelling error. Also, note that single quotes around the names of cultivars are not required.
You can enter either common or scientific names. But, keep in mind there are several versions of common names, and they can vary regionally. So, not all versions of a common name may yield the desired results.