See this post regarding AR Mini trimming/planting, and this post regarding Cyperus helferi trimming and planting!
I have hardly seen this subject talked about enough, but I think that it's one of the biggest reasons contributing to beginner's algae-filled downfalls! If you're buying plants from big stores like Aquarium Plants Factory (really good btw), Buceplant, etc. 90% of the plants you are receiving are terrestrially-grown.
Here's an important fact about terrestrially-grown aquarium plants
100% of all terrestrial leaves, when submerged under water, for any plant, will eventually get algae and die.
Some can take a while (anubias, java fern, cyperus helferi), while others will either melt (Crypts) or quickly get algae (AR Mini, Staurogyne repens, stem plants, etc)
But what about buying submerged-growth plants? From hobbyists, or BurrAqua, for example?
There is still a chance that your tank's conditions are different enough that many, if not most leaves you plant, will melt/die/attract algae.
How do we fix this? By leaving only enough leaves for the plant to continue to absorb light and put out new growth. Usually the top 4-6 leaves for stem plants.

It's a lot of work up front, but you will MAJORLY reduce the amount of waste, DOC 's, and algae-inducing scenarios if you trim your plants before planting.
I've done this in ALL of my tanks in the last 4 years with great success.
The easiest way to do this is with stainless squeeze scissors over your sink:

Here's the ones I recommend.
Yes, it takes a ton of patience. But if it could make a big difference in preventing the 2-3 month algae bloom in your tank, would you do it?

Lysimachia nummularia 'Aurea', only a few top leaves left, 3" of stem.

Hygrophila corymbosa. Note how I left the leaf nodes on the stem? That's where roots will grow from. Almost all stem plants need nodes to grow roots, even if you've removed the leaves from them.

Terrestrially-grown AR 'Mini' from APF. See how I did the same in this thread for my previous tanks.

This Anubias barteri var. coffeefolia was grown terrestrially (often called 'emersed' or emergent) in a greenhouse. I removed all but the newest 3 leaves, and trimmed the roots too. Terrestrial roots are quite different from submerged with certain plants.

Almost ALL Cryptocoryne species are grown terrestrially. These plants grow as a Rosette, where the inner-most leaves on the "stem" are the freshest, and the outer-most are the oldest. I removed a TON of old terrestrial leaves, leaving just enough for the plant to be able to grow new submerged leaves in my tank as quickly as possible, while leaving as few algae-attracting terrestrial leaves as possible. I also trimmed the roots, which were 5" long upon receiving the plant.

Lobelia cardinalis 'mini'

Penthorum sedoides. Would also look very similar for Staurogyne repens, too.
Did you know that Blyxa japonica is actually a stem plant? It looks like a rosette, but it's actually a squat, wide stem plant. The lowest/outermost leaves are the oldest, and even though this is a true aquatic plant with no terrestrial form in nature, I know that it likes to throw a fit and melt a good portion of it's oldest leaves when transitioning to my tank's conditions. Here's what it looked like when I received it from @Burr740:


Nice and trimmed up. Less problematic at the 1-2 month mark in the tank's development, I know it!
What about delicate/feather plants?
They're super annoying to prep. I still only keep the top 3-4" max.

With Myriophyllum mattogrossense 'Golden', I only keep a few inches and still try to remove some of the lower leaves that would otherwise just rot by being buried in my inert sand.

What about Myriophyllum sp. "Roraima"? F*ck that. Nightmare to trim lower leaves, just trim it to 3" (not pictured) and discard the bottom when planting.
Curious what you guys think! I know I could receive plenty of "I've never done this, my tank has been fine" but I'd recommend trying it first before having a strong opinion of it
By the way, all plants pictured were actually used in my upcoming 120cm Showcase tank:

I have hardly seen this subject talked about enough, but I think that it's one of the biggest reasons contributing to beginner's algae-filled downfalls! If you're buying plants from big stores like Aquarium Plants Factory (really good btw), Buceplant, etc. 90% of the plants you are receiving are terrestrially-grown.
Here's an important fact about terrestrially-grown aquarium plants
100% of all terrestrial leaves, when submerged under water, for any plant, will eventually get algae and die.
Some can take a while (anubias, java fern, cyperus helferi), while others will either melt (Crypts) or quickly get algae (AR Mini, Staurogyne repens, stem plants, etc)
But what about buying submerged-growth plants? From hobbyists, or BurrAqua, for example?
There is still a chance that your tank's conditions are different enough that many, if not most leaves you plant, will melt/die/attract algae.
How do we fix this? By leaving only enough leaves for the plant to continue to absorb light and put out new growth. Usually the top 4-6 leaves for stem plants.

It's a lot of work up front, but you will MAJORLY reduce the amount of waste, DOC 's, and algae-inducing scenarios if you trim your plants before planting.
I've done this in ALL of my tanks in the last 4 years with great success.
The easiest way to do this is with stainless squeeze scissors over your sink:

Here's the ones I recommend.
Yes, it takes a ton of patience. But if it could make a big difference in preventing the 2-3 month algae bloom in your tank, would you do it?
Here are some specific plant examples:
For most true stem plants, I like to leave 3-4" of stem, trimming roots if necessary, and leaving only 4-6 of the freshest leaves. More than that, they will eventually be algae magnets. Less than that (like 2 leaves only) they might not survive the shock.
Lysimachia nummularia 'Aurea', only a few top leaves left, 3" of stem.

Hygrophila corymbosa. Note how I left the leaf nodes on the stem? That's where roots will grow from. Almost all stem plants need nodes to grow roots, even if you've removed the leaves from them.

Terrestrially-grown AR 'Mini' from APF. See how I did the same in this thread for my previous tanks.

This Anubias barteri var. coffeefolia was grown terrestrially (often called 'emersed' or emergent) in a greenhouse. I removed all but the newest 3 leaves, and trimmed the roots too. Terrestrial roots are quite different from submerged with certain plants.

Almost ALL Cryptocoryne species are grown terrestrially. These plants grow as a Rosette, where the inner-most leaves on the "stem" are the freshest, and the outer-most are the oldest. I removed a TON of old terrestrial leaves, leaving just enough for the plant to be able to grow new submerged leaves in my tank as quickly as possible, while leaving as few algae-attracting terrestrial leaves as possible. I also trimmed the roots, which were 5" long upon receiving the plant.

Lobelia cardinalis 'mini'

Penthorum sedoides. Would also look very similar for Staurogyne repens, too.
Did you know that Blyxa japonica is actually a stem plant? It looks like a rosette, but it's actually a squat, wide stem plant. The lowest/outermost leaves are the oldest, and even though this is a true aquatic plant with no terrestrial form in nature, I know that it likes to throw a fit and melt a good portion of it's oldest leaves when transitioning to my tank's conditions. Here's what it looked like when I received it from @Burr740:


Nice and trimmed up. Less problematic at the 1-2 month mark in the tank's development, I know it!
What about delicate/feather plants?
They're super annoying to prep. I still only keep the top 3-4" max.

With Myriophyllum mattogrossense 'Golden', I only keep a few inches and still try to remove some of the lower leaves that would otherwise just rot by being buried in my inert sand.

What about Myriophyllum sp. "Roraima"? F*ck that. Nightmare to trim lower leaves, just trim it to 3" (not pictured) and discard the bottom when planting.
Curious what you guys think! I know I could receive plenty of "I've never done this, my tank has been fine" but I'd recommend trying it first before having a strong opinion of it
By the way, all plants pictured were actually used in my upcoming 120cm Showcase tank:
