No Math Required — This Ruler Does It For You
You planted your 4×4 raised bed in May. Lettuce, radishes, spinach — it looked like a magazine spread in June. You were proud. You took photos.
Then mid-July arrived. The lettuce bolted. The radishes were long gone. The spinach turned bitter and shot up in seed heads. You harvested the last of it… and the bed just sat there. Empty. For two months. While you drove to the store to buy vegetables.
Two months of empty bed. Two months of wasted space, wasted water, wasted potential.
Here's the secret that experienced gardeners have always known, the trick your grandmother used without even thinking about it: you don't plant a bed once. You plant it continuously. As soon as one crop finishes, another goes in its place.
Today I'm teaching you succession planting — the art of getting 2–3 harvests from the same bed in one season. And I'm giving you the one tool that makes spacing so fast and foolproof, a child could do it.
Succession planting means planting new crops in the same space as soon as previous crops are harvested. That's it. No complex system. No spreadsheets. Just: crop out → new crop in.
The key to making this work is knowing exactly how far apart to plant each crop — and being able to do it fast. That's where the spacing ruler earns its keep.
| 📐 Spacing Mistake | ⚠️ What Happens | ✅ Correct Spacing Result |
|---|---|---|
| Too close (common beginner error) |
Plants compete for light, water, nutrients. Poor airflow → fungal disease. Stunted roots. Tiny harvest. | Each plant reaches full size. Air circulates freely. Roots expand fully. Maximum yield. |
| Too far apart | Wasted space. You could have grown twice as much food in the same bed. | Maximum yield per square foot. No bare soil between plants. |
| Random spacing (no measuring) |
Some plants crowded, some with gaps. Impossible to plan succession — you don't know what space opens up or when. | You know EXACTLY when each plant finishes and how much space becomes available for the next crop. |
A long ruler with holes pre-marked at every common plant spacing: 2", 4", 6", 8", 10", 12", 18", 24". Lay it on the soil. Poke holes. Plant. Done in 3 minutes.
Rake smooth and level. Remove rocks, clumps, and old plant debris. The ruler needs flat soil to work properly.
Place it flat on the soil where you want your first row. It acts as both a measuring guide and a straight edge for your row.
Check the seed packet: "thin to 4 inches apart." Find the 4-inch hole on the ruler. That's your hole. (See cheat sheet below if your packet is confusing.)
For seeds: poke a finger or pencil into each hole marking. For transplants: use the ruler to measure where each transplant hole goes.
Drop seeds or place transplants at each mark. Depth is on the seed packet — the ruler helps with spacing, not depth.
Lay the ruler parallel to the first row, using the ruler width itself as your row spacing. Repeat the process for each row.
Rake soil gently over seeds (depth on packet). Water. An entire 4×4 bed takes 3–5 minutes with the ruler. That's it.
Real example for a 4×4 raised bed in zones 5–7. Adjust dates for your climate.
| 🌱 Season | Crop | Spacing | Plant Date | Harvest Date | Days in Bed |
|---|---|---|---|---|---|
| 🌸 Spring | Radishes + Lettuce (interplanted) | 2" radish / 6" lettuce | April 1 | May 15 (radish) June 1 (lettuce) |
60 days |
| ☀️ Summer | Bush Beans | 4–6 inches | June 5 | August 5 | 60 days |
| 🍂 Fall | Kale + Baby Carrots (interplanted) | 6" kale / 2" carrots | August 10 | Oct 15 (carrots) Nov 15 (kale) |
90+ days |
Find your vegetable. Look at the spacing column. Use that hole on the ruler. That's the entire process.
| 🥦 Vegetable | Spacing (inches) | Per Sq Ft | 📝 Notes |
|---|---|---|---|
| Arugula | 4–6" | 4–9 | Succession every 2–3 weeks |
| Basil | 8–12" | 1–2 | Pinch often, don't let it flower |
| Beans (bush) | 4–6" | 4–9 | Plant after last frost |
| Beans (pole) | 6–8" | 4–6 | Needs trellis |
| Beets | 3–4" | 9–16 | Thin aggressively |
| Broccoli | 18" | 1 | Needs wide space |
| Cabbage | 18–24" | 1 | Large plant, plan ahead |
| Carrots | 2–3" | 16–36 | Thin to 2", direct sow only |
| Cucumber (bush) | 18–24" | 1 | Trellis recommended |
| Eggplant | 18–24" | 1 | Heavy feeder, amend well |
| Garlic | 4–6" | 4–9 | Plant in fall for summer harvest |
| Kale | 8–12" | 1–4 | Harvest outer leaves, plant lives on |
| Lettuce (leaf) | 6–8" | 4–9 | Cut-and-come-again method |
| Onions (green) | 2–3" | 9–16 | Plant densely, harvest early |
| Peas | 2–4" | 8–16 | Needs trellis, loves cool weather |
| Peppers | 12–18" | 1–2 | Stake recommended |
| Radishes ⚡ | 2" | 36–64 | Ready in 25 days — fastest crop! |
| Spinach | 4–6" | 4–9 | Loves cool weather, bolts in heat |
| Squash (summer) | 18–24" | 1 | Needs 2–3 sq ft minimum |
| Swiss Chard | 6–8" | 4–9 | Harvest outer leaves |
| Tomatoes (indeterminate) | 18–24" | 1 | Cage required (see Blog #15) |
| Tomatoes (determinate) | 12–18" | 1–2 | Shorter cage sufficient |
| Zucchini | 18–24" | 1 | One plant is genuinely enough |
What it is: Planting fast-growing crops between slower-growing crops in the same space. Your grandmother's garden produced more because she knew this trick — she just didn't have a name for it.
How it works: Tomatoes are small for the first month after transplanting. That surrounding space is empty. Put fast crops there. Harvest them before the tomatoes need the room. You've just gotten two harvests from the same square footage at the same time.
How the spacing ruler helps: Use it to mark both the tomato spacing (24 inches) AND the radish spacing (2 inches) in the same bed at the same time. Perfect precision, no confusion.
It gets killed by frost before it matures and you lose the whole succession.
✅ Fix: Count backwards from your first fall frost date. Check "days to maturity" on the seed packet. Plant at least that many days before frost, plus a 14-day buffer.The second crop starves. The first crop has consumed the nutrients. Second crops that look pale and stunted are almost always nutrient-depleted soil.
✅ Fix: Between each succession, mix 1–2 inches of compost into the top 4–6 inches of soil. Takes 10 minutes. Transforms your second and third harvests.They take too long and monopolize bed space. The whole point of succession planting is rapid turnover.
✅ Fix: Use fast crops for successions (under 60 days to maturity). Radishes, lettuce, arugula, spinach, bush beans. Save large plants for dedicated permanent spots.Roots decompose slowly, and during decomposition they temporarily lock up nitrogen — the exact nutrient your new crop needs most.
✅ Fix: Pull out the entire root system before planting the succession crop. If it won't come out cleanly, cut it off at the base and dig the rest out separately.Soil becomes dry and compacted. Seeds won't germinate well. Transplants struggle to establish roots.
✅ Fix: After harvesting, water deeply. Wait 1–2 days. Then plant. Moist (not soggy) soil = fast germination and healthy transplants.| Without Spacing Ruler | With Spacing Ruler |
|---|---|
| ❌ You guess spacing. Plants are too close → disease → 30–50% harvest loss | ✅ Perfect spacing every time → maximum yield per square foot |
| ❌ Can't succession plant confidently — you don't know when or where space opens up | ✅ You know EXACTLY where and when to plant the next crop |
| ❌ 15–20 minutes measuring and marking each planting session | ✅ 3–5 minutes per planting — including setup and cleanup |
| ❌ Buy more seeds than needed because you waste space | ✅ Maximize every square inch — fewer seed packs needed |
| ❌ You feel frustrated and disorganized after every planting | ✅ You feel like a strategic garden planner who knows what they're doing |
A small raised bed can produce a shocking amount of food — but only if you use every square inch and every week of the growing season. Most gardeners use about 30% of their potential. Succession planting gets you to 90%+.
Succession planting is the secret to continuous harvests. Correct spacing is the secret to succession planting. And the Outside Pride Plant Spacing Ruler removes all the math, all the measuring, and all the guesswork.
Lay it down. Poke holes. Plant. That's it. Your grandmother knew this. Now you do too.