Darwin Perennials 2026 Catalog

CROP SCHEDULE & USES 1-QT. (10-CM) POT, 1 PLANT PER POT

PLANT GROWTH REGULATORS PGRs generally not needed

PINCHING AFTER TRANSPLANT

PESTS AND FUNGAL DISEASES

2 TO 3-GAL. (25 TO 30-CM) POT, 3 PLANTS PER POT

USDA HARDINESS ZONES

1-GAL. (15-CM) POT, 1 PLANT PER POT

BLOOM MONTHS April to September

HEIGHT

Typically not required

Aphids on the buds Rooted: 6 wks

Rooted: 6-8 wks

Not recommended 10-12 in. (25-30 cm)

4-9

Unrooted: 13-15 wks Rooted: 8-10 wks

Unrooted: 15-17 wks Rooted: 10-12 wks

Unrooted: 19-22 wks Rooted: 12-14 wks

26-28 in. (66-71 cm)

4-9

April to September

Typically not required

PGRs generally not needed

Pythium and rhizoctonia can result from overwatering.

Recommended PGRs generally not needed

Thrips, white fly

Not recommended Unrooted: 15-17 wks Rooted: 10-12 wks

Unrooted: 19-22 wks Rooted: 12-14 wks

16-22 in. (41-56 cm)

7-10

April to September

Recommended PGRs generally not needed

Thrips, white fly

Not recommended Unrooted: 15-17 wks Rooted: 10-12 wks

Unrooted: 19-22 wks Rooted: 12-14 wks

15-18 in. (38-46 cm)

5-9

April to September

6-8 in. (15-20 cm)

4-9

April to May

Unrooted: stick week 22-26 Rooted: plant week 27-31 Liner: 16-18 wks

Unrooted: stick week 26-32 Rooted: plant week 31-36 Liner: 14-16 wks

Recommended PGRs generally not needed

None noted

Unrooted: stick week 30-35 Rooted: plant week 35-40 Liner: 10-12 wks

No

PGRs generally not needed

Watch for crown rot if overwatered.

10-12 in. (25-30 cm)

5-9

March to October

Not recommended Rooted: 6-8 wks

10-12 wks

14-16 in. (36-41 cm)

4-9

Non- flowering

Not particularly sensitive. Use well- drained media. Not particularly sensitive. Use well- drained media. Pythium and rhizoctonia can result from overwatering. Pythium and rhizoctonia can result from overwatering. Pythium and rhizoctonia can result from overwatering. Pythium and rhizoctonia can result from overwatering. Pythium and rhizoctonia can result from overwatering. Not particularly sensitive. Use well- drained media.

Typically not required

B-Nine/ Cycocel sprays 2,500/1,000 ppm B-Nine/ Cycocel sprays 2,500/1,000 ppm

Not recommended Rooted: 6-8 wks

10-12 wks

16-18 in. (41-46 cm)

4-9

Non- flowering

Typically not required

Not recommended 10-12 wks

12-14 wks

14-16 in. (36-41 cm)

4-9

April to May

None

PGRs generally not needed

Not recommended 10-12 wks

12-14 wks

12-15 in. (30-38 cm)

4-9

April to May

None

PGRs generally not needed

Not recommended 10-12 wks

12-14 wks

6-9 in. (15-23 cm)

4-9

April to May

None

PGRs generally not needed

Not recommended 10-12 wks

12-14 wks

10-12 in. (25-30 cm)

4-9

April to May

None

PGRs generally not needed

Not recommended 10-12 wks

12-14 wks

12-15 in. (30-38 cm)

4-9

April to May

None

PGRs generally not needed

Not recommended 8-10 wks

10-12 wks

20-28 in. (51-71 cm)

5-9

March to October

Typically not required

PGRs generally not needed

PGRs generally not needed

Thrips, spider mites Not recommended Rooted: 12-14 wks Rooted: 14 wks

28-36 in. (71-91 cm)

6-9

August to October

One pinch, two to three weeks after transplant One pinch, two to three weeks after transplant.

PGRs generally not needed

Thrips, spider mites Not recommended Rooted: 12-14 wks Rooted: 14 wks

28-36 in. (71-91 cm)

6-9

August to October

No

PGRs generally not needed

Spider mites

Not recommended Rooted: 12-14 wks Rooted: 14 wks

48 in. (122 cm)

6-9

August to October

Not recommended Rooted: 6-8 wks

10-12 wks

8-11 in. (20-28 cm)

6-9

June to July

Typically not required

Thrips and pythium can be issues. Use well-drained media.

Spider mites, thrips Rooted: 7-8 wks

Rooted: 10-12 wks Rooted: 12-14 wks

12-14 in. (30-36 cm)

5-9

March to November

Yes

B-Nine/Cycocel combination at 3,750-5,000 ppm, B-Nine/Cycocel 500 ppm before flowering. Sumagic spray can be used after flowering if needed. B-Nine/Cycocel combination at 3,750-5,000 ppm, B-Nine/Cycocel 500 ppm before flowering. Sumagic spray can be used after flowering if needed.

Spider mites, thrips Not recommended Rooted: 10-12 wks Rooted: 12-14 wks

12-14 in. (30-36 cm)

5-9

March to November

No

FINISHING GUIDE | 149

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