Is this Grovekeeper homebrew race balanced?

Question

Grovekeepers are a race of treefolk in my own homebrew setting. They were created by the god of nature to shepherd animals and plants. I'm somewhat worried that the race might be a touch too strong.

• Ability Score Increase. Your Strength, Constitution, and Wisdom scores each increase by 1.
• Age. Most Grovekeepers recall the time when gods walked the land. They mature at around 40 years old and can live up to more than a thousand years.
• Size. Grovekeepers tower over most other races, but aren't quite as tall as their Treant cousins. Your size is Medium.
• Speed. Your walking speed is 30 feet.
• Rooted. You have advantage on any ability checks or saving throws made to resist moving you or knocking you prone.
• Chlorophyll. You do not need to eat as long as you are exposed to 1 hour of sunlight each day.
• Barkhide. You have tough bark instead of skin. When you aren’t wearing armor, your AC is 12 + your Constitution modifier. You can use your natural armor to determine your AC if the armor you wear would leave you with a lower AC. A shield’s benefits apply as normal while you use your natural armor.
• Kindling. When you are hit with an attack or fail a saving throw against an effect that deals fire damage, you take an additional 1d4 fire damage.
• Mighty Oak. Starting at 3rd level, you gain the ability to assume a massive tree-like form as a bonus action. While in this form, your size becomes Large and your melee weapon attacks deal an additional 1d4 damage. In addition, your speed is reduced by 10 feet. This transformation lasts for one minute. Once you use this trait, you can't use it again until you finish a long rest.
• Magic of Nature. You know the Druidcraft cantrip.
• Languages. You can speak, read and write Common and Sylvan.

Answer 1

It is a little on the weak side

Let’s see what we got: +1 to three abilities, resistance to prone and knock back effects, don’t need to eat (typically), okay natural armor, a slightly less debilitating version of fire vulnerability, a weaker version of the enlarge portion of enlarge/reduce at level 3, and druidcraft cantrip.

It’s not a bad race, not at all. But let’s compare to the Triton race. Same ASI, swim speed and amphibious, a 1st level spell at L1, 2nd level at L3 and 3rd level at L5, darkvision, talk to fish, and resistance to cold damage. The not needing to eat is a cool ability, but usually not worth much as few DMs rigorously track rations.

Clearly, triton is better. They get more spells, darkvision, and resistance, while the Grovekeeper gets a weaker version of one spell and semi-vulnerability.

Using Points

Let’s see how much the race is worth using Kamstra’s point system from monstrous races. The ability score increase costs 3 build points. The cantrip costs .5 BP. I’ll say Mighty Oak is worth 1 BP. Chlorophyll is worth .5. Natural Armor is worth 2.5 BP. And finally, the Kindling is worth -1 BP. This brings the total to 6.5 Build Points, with the recommendation being 8-10 Build Points.

My advice? Remove the kindling ability, and grant the enlarge portion of enlarge/reduce with no drawbacks. Consider granting darkvision as well.

Answer 2

It seems to be balanced

As @DanB recommends I used the Detect Balance spreadsheet, giving this point to the features: ASI 12, Rooted 2, Chlorophyll 1, Barkhide 3, Kindling -2, Mighty Oak 8 and Magick Nature 2, that give us a 26 points of value.

But this are suggestions based on similar traits presents in the sheet Guide. For example, Mighty Oak looks very similar to Aasimar Transformation.

To give you some references the gnomes score 23 (Rock) and 24 (Forest), and the elves 27 (High) and 28 (Wood) so it seems to be balanced, but you could go to the Official Races sheet in the spreadsheet to see the rest of the races.