Looks really well done. Well drawn indeed. Good shadow understanding and detail, really makes a difference.
If my 2cents are worth anything; I would use multiple tones instead of 2 if thats within the timeframe you have for the task. Id suggest a different background design on the final render. I feel the text design isnt on the same level of the weed drawing. Theres also some width inconsistencies. But these are just me pointing on small things.
needless to say, i think this is still satisfiable and work to be proud of.