I bought a great strong trowel from a garden store in folsom ca called green acres. It is the one with the curved handle on the right.
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Ahh I can actually give some input here too.
Green Acres is a great place, I like them quite a bit.
The closest that we have to Green Acre's is Wyntour Gardens off of Airport Rd. which is a dead ringer for a twin. We also have Gold Leaf Nursery but they aren't quite on the same level for their non-plant related selections.
I very much miss Capital Nursery, I had known them my entire life.
Just about every time I would visit my Grandmother in Citrus Heights I would get to go to Capital Nursery just off of Sunrise Blvd. Now they are gone.
Anyways, I have the thin, long trowel furthest to the left but mine has a blue handle.
I also have a wider version of the trowel second to the left.
While these tools are good for some condition, I would not really recommend them for tough, rocky digging.
The tip of my long trowel broke off right away and I have been very careful with the wide trowel as these were a little spendy.
They are aluminum so what can you expect when going through tough rocky digging?
The long serrated trowel is good for digging grass because it cuts the roots fairly easy.
So if you like to detect parks and grassy area's, this isn't a bad trowel to have.
Though for the most part, they stay home for the garden as I have more durable tools to take their place.