Fertilizing isn't just dumping granules around the base — doing it wrong can burn roots, waste money, or cause runoff in our rainy Pacific Northwest climate. At Todd's Nursery in Puyallup, we see homeowners make the same mistakes every season. Follow this step-by-step process to feed your trees, shrubs, and landscape plants properly.
💡 Note: This method works for most established trees and shrubs. Young or newly planted ones (under 2–3 years old) need lighter feeding — ask us if you're unsure.
1Consider a Soil Test (Optional but Helpful)
A soil test isn't required for most home gardeners — plenty of people get great results with a balanced all-purpose fertilizer. But if you want to be precise or you're seeing problems, a test can tell you exactly what your soil needs.
- •Grab a test kit from Todd's or WSU Extension
- •Tests check pH, nitrogen (N), phosphorus (P), potassium (K), and micronutrients
- •Puyallup-area soils are often clay-heavy and slightly acidic
If your established plants look healthy, you may only need light feeding every 2–3 years — or none at all.
2Choose the Right Fertilizer
Match the product to your plants' needs (refer back to NPK ratios):
🌲 Trees & Shrubs (maples, evergreens, fruit trees)
Balanced or low-P like 10-5-10, 16-4-8, or 8-2-5 slow-release.
🌺 Acid-loving plants (rhodies, azaleas)
Use formulas with micronutrients designed for our Pacific Northwest soils.
🌿 General landscape plants
Slow-release granular works best for PNW — less leaching in our rainy climate.
Pro tip: Opt for slow-release nitrogen to avoid quick burn and provide steady feeding. We stock great options at Todd's — stop by for recommendations.
3Calculate How Much to Use
Don't guess — measure.
- 1.Find the "drip line" — the outer edge of branches where roots are most active.
- 2.Fertilize an area 1.5–2 times the drip line diameter (roots spread far!).
- 3.Rate: Aim for 1–3 lbs of actual nitrogen per 1,000 sq ft of root zone per year (lower for evergreens, higher for young/deciduous).
Example calculation:
For a 20-ft-wide tree canopy, root zone ≈ 1,000–2,000 sq ft → use 1–3 lbs N total.
Check the bag: Divide desired N by the first NPK number (e.g., for 2 lbs N with 16-4-8 fertilizer: 2 ÷ 0.16 = 12.5 lbs of product).
⚠️ Washington guideline: Follow WSU recommendations — max 4 lbs N per 1,000 sq ft per year to protect local waterways.
4Apply the Fertilizer Correctly
The easiest, most effective method for home gardeners is broadcasting (spreading evenly on soil surface).
- 1Prep the area: Rake mulch back if thick; aerate compacted soil lightly.
- 2Spread evenly: Use a broadcast spreader (for large areas) or hand-scatter (small shrubs). Start at the trunk and work outward to the drip line + a bit beyond.
Avoid: Piling around the trunk/stem (causes burn) or on foliage (washes off).
- 3Water it in: Lightly water immediately after (or apply before rain) to move nutrients into soil. In Puyallup's wet climate, natural rain often helps.
For groups of shrubs or beds: Estimate total area and spread uniformly.
5Time It Right & Follow Up
Best times to fertilize in Pacific Northwest:
✅ Early Spring
Late March–early May, as buds swell before heavy growth
✅ Late Fall
October–November, after leaves drop but before hard freeze — roots absorb for winter health
❌ Avoid: Mid-summer (stresses plants) or late summer (tender growth risks frost damage).
Common Mistakes to Avoid
- ✗Over-fertilizing: Causes burn, excessive weak growth, fewer blooms.
- ✗Applying on dry soil: Nutrients concentrate and damage roots.
- ✗Fertilizing stressed plants: Wait until they're healthy.
- ✗Ignoring local conditions: Our clay soils hold nutrients longer — less frequent feeding needed.
Frequently Asked Questions
When is the best time to fertilize trees in Washington?▼
How much fertilizer should I use?▼
Can I over-fertilize?▼
Ready to Feed Your Yard?
Follow these steps, and your trees, shrubs, and plants will thank you with vibrant growth all season. Need help picking the right fertilizer or calculating amounts? Swing by Todd's Nursery in Puyallup — our team knows South Sound soils.
Questions about your specific plants? Give us a call at (253) 841-3280 — we're happy to help Puyallup, Bonney Lake, Orting, and Sumner gardeners! 🌲
— The Team at Todd's Nursery & Landscaping