Petunias are not fussy about soil other than it be well drained. They are very particular about needing lots of sunlight.
Dahlias are not classed as acid lovers they prefer a neutral soil but will tolerate some acidity.
yes they are they can sometimes but not all the time
"Ericaceous" plants. No, Tomatoes are not ericaceous
Yes!
Chrysanthemums like it mildly acid.
Are lilac bushes acid loving plants OR DO THEY NEED ALKALINE FERTILIZER
yes\
Yes!
Oddly enough nearly all garden plants like a slightly acidic soil and dahlias are no exception. They will be very happy at about pH 6.5 or even a bit lower. Ray
Yes they are. Here is a website with acid loving plants and there pH preferences. http://www.coopext.colostate.edu/TRA/PLANTS/index.html#http://www.coopext.colostate.edu/TRA/PLANTS/acidlove.html
Chrysanthemums like slightly acid soil. 6.5 on the PH scale.
Cyclamen will tolerate both acid and alkaline conditions but grow best in a neutral fertile soil.
Save your Miracid for acid loving plants like azaleas, rhododendrons, blueberries, strawberries and heathers. They need a PH of 5.5. Chrysanthemums only need PH 6.5.
plants do not love. but it requires excess amounts of nitrogen in most cases.