Speed-Gro & Agriculturist Crop Timing

How to use this page

Speed-Gro adds 10% first-growth acceleration, Deluxe Speed-Gro 25%, and Hyper Speed-Gro 33%. Agriculturist adds another 10%, while keeping the prerequisite Tiller sale bonus. The supported combined growth bonuses are 0, 10, 20, 25, 33, 35 and 43%.

For Strawberry, the first growth takes 8 days with no bonus, 7 with Speed-Gro, 6 with Deluxe Speed-Gro, and 5 with Hyper Speed-Gro. Agriculturist plus Hyper Speed-Gro reduces it to 4. The 4-day interval between later harvests never changes.

Spring 13 strawberries have 15 growth days left. Speed-Gro allows harvests on Spring 20, 24 and 28. Without it, the two harvests fall on Spring 21 and 25. Input fertilizer cost to see whether the third harvest pays for the purchase.

This calculator assumes fertilizer is present from planting. Applying it to a plant already partway through growth is a different timing problem. Quality fertilizer improves quality chances, not first-growth speed; choose fixed sale quality separately.