Robin Holly

What diseases effect Robin Red Holly trees?

Robin Red Holly trees (*Ilex x 'Conin') are generally hardy and resistant to many diseases, but they can still be affected by a few common issues. Here are some diseases that may impact Robin Red Holly trees:

1. Leaf Spot (Tar Spot or Fungal Leaf Spot): This fungal disease causes dark brown or black spots on leaves. It can lead to defoliation in severe cases, especially in humid conditions.

   • Treatment: Prune affected branches and ensure good air circulation around the plant. Fungicides may help prevent the spread.

2. Root Rot (Phytophthora): Root rot is caused by poor drainage or overly wet soils, leading to the decay of the tree's root system. Symptoms include wilting, yellowing leaves, and stunted growth.

   • Prevention: Plant in well-draining soil and avoid overwatering.

3. Holly Leaf Miners: These are insects that tunnel into the leaves, causing blotchy discoloration and damage. While it’s not a disease, the damage from leaf miners can reduce the plant's vigor.

   • Control: Use insecticides or encourage natural predators like parasitic wasps to manage the population.

4. Anthracnose: This fungal disease can cause irregular brown spots on the leaves, and it tends to thrive in damp, cool weather.

   • Treatment: Remove and dispose of infected leaves and apply fungicide if necessary.

5. Nematodes: These microscopic worms can attack the roots of the tree, leading to poor growth and yellowing of the leaves.

   • Prevention: Maintain healthy soil with good organic matter to reduce the risk of nematode damage.

Ensuring your Robin Red Holly is planted in well-draining soil, spaced appropriately, and watered properly can prevent many of these issues.

HI there, I need to block 2nd story windows from my back neighbors. Will it grow to at least 15 feet? They will be in shade of big elm tree. Would them survive to grow? How many do I need for 20 feet length? Tight row is desired. If not Robin Holly, what would you suggest? Thanks in advance. Regards

To block your 2nd story windows with a tall plant, a Robin Holly could work, but it may not reach 15 feet in full shade as it prefers partial sun to thrive. For 20 feet of length, you'd likely need 3-4 plants spaced around 5-6 feet apart for a tight row.

If you're open to alternatives, consider a taller evergreen like American Holly (Ilex opaca) or Yew (Taxus baccata), both of which can tolerate shade and grow to 15 feet or more. Another option could be Arborvitae (Thuja) for dense coverage and shade tolerance.

Having a problem in my Zone 8a garden in Arkansas with dieback on Lindleyana butterfly bush and Blue Diddly Vitex. There doesn't seem to be anything I can associate with the cause of branches wilting and then dieing completely or in the case of Vitex it may take weeks to find out how much of branch is dead .

Likely root stress or fungal issue (like root rot or canker). Check drainage, avoid overwatering, prune dead wood, and consider a fungicide.

How much water does it take, after established?

Low to moderate water; drought-tolerant once established.

How much sun does this bush require?

A Robin Hill Holly (Ilex x 'Robin Hill') requires full sun to partial shade to thrive. Ideally, it should receive at least 4 to 6 hours of sunlight per day for optimal growth and berry production. Planting in full sun encourages dense foliage and vibrant color, while partial shade is also tolerated, though growth may be slower. This evergreen shrub is a great option for hedges or screens, and it thrives in well-draining soil with regular watering.

how large does it get?

The Robin Hill holly (Ilex x Robin Hill) can grow to a mature height of about 8 to 10 feet and spread 6 to 8 feet wide. It is a versatile, compact evergreen shrub that works well for hedges or as a stand-alone specimen. Regular pruning can help maintain its shape and size if needed.

Do you cut back the 3 gallon Robin holly to ship them? I ordered 10 and when I received them it looked like they were cut to fit the shipping box.

Yes, sometimes the plants are trimmed before being packaged. If not, the plant would be partially damaged if all the stems and branches were bent and smooshed to fit in a box. With that being said, we do try and send the best looking, healthiest version of the plant.