Just a short overview of my Poppy jungle build and why I uploaded it here.

If much interest is generated from this guide, I will gladly work on it a bit more. I just noticed that there were no recent Poppy jungle guides. She is a fun champion and I wish to see her more out on SR.

Any feedback, questions, etc. would be much appreciated.

Cheers, friends.

I like to go from Red - Wolves - Blue usually.
An alternative route is to take the Golems first for the extra stun, that will help take down Red. Only use if you can get a fairly decent leash.

If your team can invade early on, your E can be crucial in securing an early kill in their jungle.

Poppy is pretty tough in the new jungle so you should avoid going back too early. I prefer to keep up the aggression in the early laning phase.

Smite always.

Flash is preferable but I mean if your a Ghost kind of summoner, you can run with that. I see a few other Poppy guides which have Ghost instead. It's all about your preferences and play style.

Valiant Fighter

All physical and magic damage dealt to Poppy that exceeds 10% of her current health is reduced by 50%. Valiant Fighter does not reduce damage from structures.
A complex passive that basically just helps to reduce incoming damage, which is always good. Am I right?

Devastating Blow

COST: 55 mana
COOLDOWN: 8 / 7 / 6 / 5 / 4

Active: Poppy's next basic attack is converted into magic damage and deals bonus magic damage equal to a flat amount plus 8% of the target's maximum health. Devastating Blow's flat bonus plus percent health component cannot exceed a damage threshold.
Total Magic Damage: 20 / 40 / 60 / 80 / 100 (+ 100% AD) (+ 60% AP) (+ 8% of target's maximum health)
Maximum Bonus Damage: 75 / 150 / 225 / 300 / 375
Adds bonus damage to next auto attack. Useful with Sheen.

Paragon of Demacia

COST: 70 / 75 / 80 / 85 / 90 mana
COOLDOWN: 12

Passive: Upon receiving damage from or dealing damage with a basic attack, Poppy's armor and damage are increased for 5 seconds, stacking up to 10 times.
Armor & Attack Damage per Stack: 1.5 / 2 / 2.5 / 3 / 3.5
Max Armor & Attack Damage: 15 / 20 / 25 / 30 / 35

Active: Poppy receives maximum stacks of Paragon of Demacia. Additionally, she gains increased movement speed for 5 seconds.
Movement Speed: 17 / 19 / 21 / 23 / 25%
Useful for added jungle tankiness & clear speed.

Heroic Charge

RANGE: 525
COST: 60 / 65 / 70 / 75 / 80 mana
COOLDOWN: 12 / 11 / 10 / 9 / 8

Active: Poppy charges at an enemy, dealing magic damage and carrying it 300 units along with her. If they collide with terrain, she stuns her target for 1.5 seconds, dealing additional magic damage.
Magic Damage: 50 / 75 / 100 / 125 / 150 (+ 40% AP)
Collision Magic Damage: 75 / 125 / 175 / 225 / 275 (+ 40% AP)
Total Magic Damage: 125 / 200 / 275 / 350 / 425 (+ 80% AP)
Poppy's bread and butter.
Best ability for engaging. Make sure to always hit the enemy into a wall, or flash ahead and E them back into teammates.

Diplomatic Immunity

RANGE: 900
COST: 100 mana
COOLDOWN: 140 / 120 / 100

Active: Poppy focuses intently on a single enemy champion, dealing amplified damage to them, and becoming immune to all damage and abilities from enemies other than her target.
Duration: 6 / 7 / 8
Increased Damage: 20 / 30 / 40%
BAM! Super tank. This is another bread and butter for Poppy. So useful for tower diving, ganks and team fights.

Skill information taken from League of Legends wiki. From the Poppy page of course.