The Destiny garden is a large, domed room on the starboard side of Destiny in which the crew is growing some of their own necessities. The idea for the dome room to be converted into a garden was brought up by Dr. Lisa Park in a staff meeting, however it was dismissed by Colonel Everett Young as he wanted the weapons systems repaired for more security. (SGU: "Trial and Error")
Nonetheless, the idea was later pursued using the Ancient maintenance robot. Destiny's garden is able to produce a much larger quantity of supplies than the original hydroponics lab. The garden is also able to produce a larger supply of oxygen than before which may benefit the crew. The repairs to dome have clearly diminished the amount of power Destiny required to extend shields over damaged sections. Robert Caine was also brought to the garden shortly before he died along with the others who had remained on, and later returned from, Eden.
When Destiny was blocked by drones from every star suitable for safe recharge and had to recharge in a blue giant, the garden's transparent dome caused temperature to rise so much that the garden immolated, destroyed by fire. Only a fraction of its content was evacuated to the old Hydroponics lab and survived. The dome was breached during the recharging process and was vented. The extent of the damage is unknown at this time. (SGU: "Blockade")