Hi @adrynapoletano,
A couple things to try.
1) Try to lower the AP (closer to the ground if possible) and/or tilt it such that the line of site of the antennas point directly at the garden. That is to say, you want to tilt the AP so that a right angle coming from the Antenna points towards the garden.
2) You may need to replace the omni directional antennas with directional antennas. I've also seen some folks use the CPE model in lieu of the Outdoor for longer distance, directional use.3) Some other configuration tips:
Some config tips:
a) Disable Airtime fairness, Disable Band Steering
b) Use separate SSID's for 2.4 & 5.8
c) Turn up transmit power to High
d) Manually select an unused channel for the 2.4 and 5.8GHz radios
e) Set the 2.4GHz BW to 20MHz, Set the 5.8GHz BW to 20MHz (20MHz carries further and there are more channels to choose from)
f) Set the 5.8GHz radio for 802.11n & ac only
g) Make sure your firmwares are up to day (EAP225, 245, OC200)
3) Compare the performance between the 2.4 & 5.8 Ghz bands
I have seen some videos on YouTube for folks reviewing the 225-Outdoor. It seems like up to 100m should be possible. BUT, not only does the EAP have to transmit to you, but your handset needs to transmit back that same distance. Your handset may work better on one band versus the other.
-Jonathan