Darwin Perennials 2025 catalog

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

PLANT GROWTH REGULATORS

PINCHING AFTER TRANSPLANT

PESTS AND FUNGAL DISEASES

2 TO 3-GAL. (25 TO 30-CM) POT, 3 PLANTS PER POT Unrooted: 19-22 wks Rooted: 12-14 wks

USDA HARDINESS ZONES

1-GAL. (15-CM) POT, 1 PLANT PER POT Unrooted: 15-17 wks Rooted: 10-12 wks

BLOOM MONTHS

HEIGHT

Recommended PGRs generally not needed

Pythium and rhizoctonia can result from overwatering.

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

12-14 in. (30-36 cm)

5-8

June to July

Typically not required

PGRs generally not needed

Aphids on the buds Rooted: 6 wks

Rooted: 6-8 wks

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

4-9

April to September

Typically not required

PGRs generally not needed

Pythium and rhizoctonia can result from overwatering.

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

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

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

9-12 in. (23-30 cm)

7-10

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

Not recommended Rooted: 6-8 wks

10-12 wks

14-16 in. (36-41 cm)

4-9

Non- flowering

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

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

Pythium and rhizoctonia can result from overwatering.

Not recommended 10-12 wks

12-14 wks

10-12 in. (25-30 cm)

4-9

April to May

None

PGRs generally not needed

Pythium and rhizoctonia can result from overwatering.

Not recommended 10-12 wks

12-14 wks

12-15 in. (30-38 cm)

4-9

April to May

Typically not required

PGRs generally not needed

Not particularly sensitive. Use well-drained media.

Not recommended 8-10 wks

10-12 wks

20-28 in. (51-71 cm)

5-9

March to October

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

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

Typically not required

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

Not recommended Rooted: 6-8 wks

10-12 wks

8-11 in. (20-28 cm)

6-9

June to July

Yes

B9/Cycocel combination at 3750-5000 ppm B9/500 ppm Cycocel before flowering. Sumagic spray can be used after flowering if needed B9/Cycocel combination at 3750-5000 ppm B9/500 ppm Cycocel before flowering. Sumagic spray can be used after flowering if needed

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

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

14-16 in. (36-41 cm)

5-9

March to November

FINISHING GUIDE | 153

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