Possible Clues:

• Shrub a.k.a. euphorbia
• Plant with sulphur needing decontamination
• Poinsettia, e.g.
• Seconds taken to clear away plant
• Sulphur required by cleansing plant
• Poinsettia, for one
• Poinsettia family
• Type of shrub
• Plant containing a milky juice
• Start to slave and clear out weed