Boston Ivy Care
Parthenocissus tricuspidata
A very vigorous, fast-growing climber with three-lobed leaves, used to cover large walls and buildings. Its leaves take on striking colors in autumn, turning from red to purple. It adapts to all conditions from full sun to shade, but shows its best color in the sun.
Monthly care calendar
Timings are for a temperate Northern Hemisphere climate. In warmer areas tasks start earlier, in colder areas later; in the Southern Hemisphere shift them by six months.
- Pruning: This is the best time for hard pruning to control the spread of ivy and keep it away from windows, roofs and wooden surfaces.
- General care: Dormancy period. The branching pattern on the wall is prominent.
- Pruning: Finish pruning by the end of the month.
- General care: This is a suitable time for propagation by cuttings or for planting new seedlings.
- Watering: Water only newly planted seedlings (10-15 L/week if there is no rain).
- Fertilizing: Absolutely not needed; it causes uncontrolled growth.
- Pruning: Prune just before the shoots break. Because flowers form on this year's new shoots, hard pruning increases flowering.
- General care: The buds burst and new leaves emerge.
- Frost risk: Young shoots are rarely affected by severe late frosts.
- Watering: If there is no rainfall, water every 15 days.
- Pruning: Guide growth by pruning shoots reaching toward unwanted places.
- Plant protection: Watch for powdery mildew (Erysiphales) or pests such as the Japanese beetle (Popillia japonica).
- General care: It grows very fast and needs regular checking and guidance.
- Pests & diseases: Powdery mildew can appear in shady and humid conditions.
- Watering: If there is no rainfall, water once a week.
- Pruning: Continue pruning for control.
- Plant protection: If leaf spot diseases (Cercospora, Guignardia) are seen, spray appropriately.
- General care: Spread a 5-7 cm layer of mulch over the root zone; it retains soil moisture and suppresses weeds. Do not pile mulch against the trunk.
- Pests & diseases: Observe the leaves for leaf spot diseases.
- Watering: Water deeply twice a week; prefer infrequent and generous watering over small and frequent. The area around the roots should be wetted to a depth of 20-30 cm.
- Pruning: Summer pruning is important to keep windows and architectural details exposed.
- General care: It produces small, inconspicuous flowers.
- Watering: Water deeply twice a week; prefer infrequent and generous watering over small and frequent. The area around the roots should be wetted to a depth of 20-30 cm.
- Pruning: Continue pruning for control.
- General care: Keep it in a position sheltered from midday sun; scorching at the leaf edges is a sign of burn.
- Watering: Water deeply twice a week; prefer infrequent and generous watering over small and frequent. The area around the roots should be wetted to a depth of 20-30 cm.
- General care: Growth continues.
- Watering: If there is no rainfall, water once a week.
- Fertilizing: Not needed; it should not be given.
- Pruning: This is not the main pruning period. Cut only to limit growth.
- General care: Autumn coloring begins. Parts that receive sun color earlier and more brightly.
- Watering: If there is no rainfall, water every 15 days.
- General care: This is the month when autumn colors are at their most vivid and impressive.
- General care: The leaves fall. The fruits remain on the branches for the birds.
- Pruning: Once the tree is fully dormant, major pruning can begin toward the end of the month.
- General care: Full dormancy period.
The care advice on this page is general and for information only; it is not professional advice. Plant age, soil and your garden’s microclimate can change the outcome. Plant protection products are mentioned only as general information; they are regulated, and the choice, dose and timing must be decided by a qualified professional under local rules. Consult a landscape architect or agronomist before applying.
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