10 Minute Grimp
Best strategy to complete this is to not forget to use the SixAxis and charge yourself up. This allows you to have a boost of energy that will gain you more pollen as long as you don't move from where you have landed after initiating the charge. This can be activated by bringing your remote straight down. To gain the pollen bonus you have to hit the prowlers with your Grimp, not your string. Here is a video showing you what you can do.
Garden 1 is the best choice for this and is pretty easily done if you rush yourself and use your SixAxis on the big seeds at the top of the garden.
Zero Wasted Pollen
This trophy can again, be easily done on garden 1. Patience is the major key for this trophy. Don't rush, you have all the time in the world. Aim for the center of the prowlers and you'll get all of the pollen in your initial hit. Also, if you spin you can also suck in pollen towards your Grimp. One place where you might need to use the SixAxis is at the top right big seed that takes a large amount of time to fill. Be careful here because it is extremely easy to fall off or lose some pollen. Another key is to save your Spectra for as long as possible. If you start collecting them, then your time is going to drop down faster. So try and get as many power crystals as possible and try and chain seeds so you can get free crystals. Also a correction of the trophy, you need to get all the Spectra without missing any pollen, not all seeds. These videos show me getting all seeds and then I go ahead and get the last Spectra in a part of a video I deleted because I initially thought you only needed all the seeds but I do in fact go and get the last Spectra I need and get the trophy which was located at the beginning of the garden.
Fifteen Crystals
The 15 power crystal trophy is pretty easy on the 4th garden. If you are going for the Spectra closest to the ground, (you have to go up the 2nd rock then down it) you will see more seeds below it. Keep on going down until you reach the bottom of the rock on the left side and you'll see a stream of power crystals going straight down. Take aim and then shoot yourself straight and you'll get 15.
500 Dead Pollen Prowlers
Go for this trophy while doing "The Hundred Thousander"
The Hundred Thousander
Many people suggest doing this on garden 3 as you will be able to easily get high combos. That's the level I did it on as well. You will collect somewhere around 700-800 prowlers and get around 350,000 points to get this trophy. I suggest not trying to get the Spectra until you desperately need it but going through the level normally and getting all of the power crystals to stay alive and then going back for Spectra. Time starts to go down quicker as you collect more Spectra.
Combo 10
Go for this trophy while doing "Combo 15"
10 combo will most likely be completed sometime during the campaign but if not, one can resort to garden 3.
Combo 15
Can be done with pretty good results on garden 3. As the level starts off. Run to the left and open the first two seeds you see. A shielded baddie will come at you. Jump around until you see enough pollen prowlers then roll at him and start collecting. This trophy is a bit about luck as well as timing. I'll post a video as soon as I record it. Another strategy that is very easy to do with a little practice is on garden 9. See next post for video
All Gardens Clear
Get a Spectra in each garden
You can open up every garden at a global collection of 35 Spectra. So you need a minimum of 36 Spectra to get this trophy.
All Spectra Found
Get all Spectra
50 Spectra in total. Refer to guides for Gardens 1-10 to find them all.
3 Play Ping Pong
See following post for video
The Hundred Thousander, 500 Dead Pollen Prowlers, Combo 10 and Combo 15 are all achievable in co-op modes. This can decrease the load by splitting up the work. Since I don't play this game co-op or have multiple controllers to do this with my tips are assuming you only have 1 controller.
I'll be adding more videos in the upcoming days to fill in the slots I haven't already added stuff in. Please feel free to help out and contribute videos for the Combos, 3 play ping pong, or Garden 10.