Try to make matches near both flowerbeds to fill the field with flowers faster. Each 3 matches or explosions next to a flowerbed make it produce 4 flowers on the field.
The more flowers you have present on the field, the more auto-matches will happen, which will help in collecting acorns as well. As soon as you collect all the required flowers, switch to the acorns. Both can be easily collected with a Rainbow Blast, which charges faster if you explode several power-ups at the same time.