Solved
Dark Ages Day 8
Use the Given Plants
Plant two Sun-Shrooms first to the far left (C1 or column one) and use Gravebusters to collect SUN from the graves to then plant Fume-shrooms (C4 from the left) and Walnuts (C5). Plant Sun Beam at least one square to the left of the Coneheads and then as many Bucketheads as possible to give you the SUN to plant more Fume-shrooms and replace Walnuts as needed.
If you have not yet reached the target SUN total before the Final Level then remove plants from the lawn to keep Zombies alive as long as possible !!
