Hello Linda,

A Michigan‑specific, research‑based diagnosis of why new raspberry bushes in brand‑new ground would drop leaves, turn gray, fail to grow, and produce no berries — and how to fix it.

What’s happening to your new raspberries (Michigan‑specific)

1. Transplant shock (the #1 cause in new plantings)

New raspberries commonly drop leaves and show poor growth during establishment.

This is especially true if:

Roots were disturbed

Soil texture changed (nursery soil → your clay/sand mix)

Weather was hot/dry after planting

Transplant shock alone can cause grayish, dull leaves and leaf drop.

2. Soil or drainage mismatch

Raspberries need well‑drained, fertile soil.

This is extremely common in Michigan clay subsoils.

Symptoms match:

Leaves turn gray or dull

Plants stall

No fruiting

Leaf drop under stress

3. Watering stress (too much or too little)

New raspberries have shallow roots and are very sensitive to:

Waterlogged soil → gray leaves, root stress

Drought → leaf drop, no fruiting

Letting the top 2–4 inches of soil dry before watering again

4. Early fungal stress (gray mold / powdery mildew)

Your tab notes that gray mold and powdery mildew can appear on stressed new plants.

Gray leaves + leaf drop = classic early Botrytis stress.

5. Nutrient deficiency in new soil

New ground often lacks potassium and micronutrients.

Nutrient deficiency causes yellowing/browning leaves and poor growth.

Raspberries are heavy feeders compared to many ornamentals — so other plants nearby may look fine while raspberries fail.

6. Climate stress (Michigan heat/drought)

Michigan's hot, dry summers stress new raspberries.

Heat stress causes:

Grayish, dull leaves

Leaf drop

No fruit set

7. Normal non‑production in year 1

New raspberry plants may not fruit for 1–2 years.

So the lack of berries is not a disease indicator.

Most likely diagnosis for YOUR plants

Based on your symptoms and the research:

Primary cause:

Based on your symptoms and the research:

Primary cause:

Transplant shock + soil/drainage stress

(leading to gray leaves, leaf drop, and stalled growth)

Secondary contributors:

Watering inconsistency

Early fungal stress (Botrytis)

Nutrient deficiency in new soil

This combination is extremely common in Michigan raspberry plantings.

What to do now (Michigan‑specific, research‑based

1. Check soil drainage

If water pools or soil stays wet for days → raspberries decline.

Improve drainage by:

Loosening soil around plants

Adding compost

Raising rows slightly

Emphasizes drainage improvement.

2. Water correctly

Recommends:

Deep, infrequent watering

Let top 2–4 inches dry between waterings

Avoid overhead watering (reduces fungal risk)

3. Add organic matter

Add compost to improve aeration and drainage.

Raspberries respond dramatically to organic matter.

4. Mulch properly

Apply 4 inches of mulch to regulate soil temperature and moisture.

Avoid burying the canes.

5. Inspect for early fungal disease

Recommends checking for:

Gray mold

Powdery mildew

Spots on leaves

Remove infected leaves/canes and destroy them (not compost).

6. Test soil pH and nutrients

Recommends:

pH 6.0–6.5

Add compost or balanced fertilizer if needed

7. Give them time

New raspberries may not fruit for 1–2 years.

Focus on root establishment this year.

Bottom line (your exact situation)
Your new raspberries are almost certainly suffering from transplant shock + soil/water stress, with possible early fungal involvement. This is fixable, and the plants can recover next season with proper care. If the problem persists despite these steps, consider sending a sample of affected leaves to your local extension office for diagnosis. This will help confirm if it’s a nutrient deficiency, fungal infection, or another issue.

If you want a precise diagnosis

Send the MSU Plant and Pest Diagnostics:

A SAMPLE OF THE WHOLE PLANT AND THE GRAY LEAVES

WITH THOSE SAMPLES SEND:

A photo of the gray leaves

A photo of the whole plant

A description of soil moisture (wet/dry)

Whether the site is clay, sand, or mixed

This link will explain the details on submitting a sample to the MSU Plant & Pest Diagnostics Lab:

Submit Samples - Plant & Pest Diagnostics