How to craft and use Progenative fertilizer in Icarus Update
Farming in Icarus just got a serious buff thanks to the new opt-in seed system, and one of the standout tools in this change is Progenative Fertilizer. This stuff isn’t your average garden mulch - it’s a powerful tier 2 item that transforms your crops into seed-making machines. Instead of cluttering your inventory with random seeds, you now have the choice to turn a harvest into a full-on seed factory, but only if you want to. Progenative Fertilizer is perfect for players looking to build up seed reserves or get more out of their dirt mounds and crop plots without needing higher-tier tools.

Unlock and craft fertilizer
To get started, you’ll need access to the Herbalism Bench and unlock the fertilizer at Tier 2 of your Technologies Tree. The recipe requires one basic fertilizer and either inert or volatile substance. Both work, but volatile is a little easier to come by if you’re using spoiled foods or compost tricks.

You’ll also want to have a stockpile of wood and biomass running through your compost bin to generate the base ingredients. Once you’ve got your materials, drop them into the bench and start crafting. Each batch gives you one Progenative Fertilizer, and it’s worth it when you see what it does to your crops.

How it works
When applied to a crop plot or dirt mound, it gives that plant a buff that lasts about 20 minutes. During this time, any crops harvested from that plot will give you a 300% seed yield. That means instead of getting a couple seeds, you get a whole handful. But there’s a twist - you don’t get the actual crop from that harvest. It’s a trade-off. You’re telling the plant, hey, I don’t need food right now, I just want seeds. Perfect for prepping a big garden or farming recipes that rely on oils or seed-based crafting. You’ll see the buff icon pop up as soon as you apply the fertilizer, so you know it’s active.

Once you’ve crafted the fertilizer, equip it to your hotbar, walk up to your crop plot, and press the use button to spread it. Easy as that. The plot will flash and a buff icon will appear, confirming that the fertilizer is doing its thing. Now just wait until the crops are fully grown, then harvest them. You don’t need any special sickle for this method - any tool will work, even your hands. The moment you pick the crops, you’ll notice a big boost in seeds dropping into your inventory. Just keep in mind that the fertilizer won’t work forever, so try to time it close to when the crop is mature.
When to use and when to skip it
This fertilizer shines when you’re trying to bulk up on specific seeds without wasting higher-tier gear or time grinding. It’s especially good for fiber, potatoes, or vegetables that you want to convert into oil or fuel. On the other hand, if you’re low on food or trying to stock your fridge, maybe skip this step. You won’t get any edible output from the fertilized crops, so be strategic. It’s also best used when your crop plots are all synced and growing together - this way, you don’t waste the 20-minute window waiting on random plants to finish growing.
Combining it with talents and upgrades
If you’ve specced into the Cooking and Farming talent tree, the fertilizer gets even better. The Seed Master and Prolific Crop talents both stack with the fertilizer’s effect, meaning you can pump your seed yield to ridiculous levels if you plan it right. Combine this with the new sickle attachments or the Reaper Sickle and you’ve got a full-on industrial seed farm. But even without talents, Progenative Fertilizer is strong on its own and helps newer players get access to seeds without jumping tiers.

It’s the perfect tool for players who want to take control of their seed output and build up resources without spamming wild plants. With a little setup and planning, you can boost your yield, prep for advanced recipes, and cut down on grind.
Progenative Fertilizer is a game-changer in Icarus farming. It’s the perfect tool for players who want to take control of their seed output and build up resources without spamming wild plants. With a little setup and planning, you can boost your yield, prep for advanced recipes, and cut down on grind. Whether you’re early in the game or just trying to optimize your farming loop, this fertilizer gives you a smart and simple way to grow your seed stash exactly when you need it.
