Poirot’s Crossword Conundrum

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Across
  1. 1. Swamp dwellers known for their knees
  2. 4. Steel ____
  3. 5. Nature's way of making your MS lawn look snowy in may
  4. 6. The herb your parents pretend they never stocked
  5. 7. Mucilaginous green behind southern cuisine
  6. 11. aka mother-in-law's tongue
  7. 12. Probably yells at younger plants to get off its sand
Down
  1. 2. ???
  2. 3. Used for wicker, cricket bats, and double basses for cheapskates
  3. 8. Arachnophobes' false alarm - found dwelling in many homes.
  4. 9. The slimy centerpiece of bhindi masala
  5. 10. Edible weed your neighbor hates.