Gardenescapes upgrades are currently 4 and are divided between those that can be used during the game (the first two below) and those that are activated at the beginning (the last two). http://web.iama.it/grid-demo/blog/blog-entries/The-most-popular-and-trending-game-of-the-new-year-is-Dota-2-Auto-Chess/
The blade eliminates an element from the game: the element above will replace it. It is very useful if you are missing only one element of a type to finish the level and you can't get it in any other way. You can also use more than one shovel in a row. Using the shovel does not move you forward.
By choosing this upgrade at the beginning of the level, you will start playing with two round bombs. They will be positioned in a completely random way on the screen so it depends a little on luck how useful this upgrade will be. https://www.givology.org/~pointssale/blog/672249/
I find it very useful in levels where at the beginning most of the space is blocked.
This enhancement is difficult to obtain as a reward (but like the other three initials you can buy it with coins) and like the previous one, it must be chosen before starting the level. https://www.care.com/c/questions/33441/gardenscapes-is-a-very-beautiful-and-exciting/
You will then begin the level with a dynamite bomb and a rainbow bang positioned randomly in the game platform. It can be useful in particularly difficult levels even if only the part of dynamite is often useful.
For some holidays, Gardenscapes offers special events that take around 7-10 days where new missions or new levels are available. For example, for Easter special levels have been introduced related to the Easter Rabbit. Similarly, for the Chinese New Year, separate levels had been introduced which if they were all overcome, led to the opening of a box with several prizes. https://www.okedisini.com/blogs/fifa-19-points-sale/86846-play-gardener-and-find-hidden-objects-in-gardenscape
Apart from bringing some novelty into the game, often these holiday periods are very useful for accumulating coins and extra upgrades. In fact, in addition to the prizes in the boxes, for every Austin festive level of 90 coins instead of the usual 50, to which are added any bonus bombs.